Thoughts on co-sleeping ?

It's up to you how you raise your kid. Does he have any special needs or other extenuating circumstances? If not, personally I would try not to make it a habit for him. Bring him back to his bed when this happens and stay up with him until he falls asleep again so he can be more comfortable in his own bed. That can be exhausting but I think it would be good for both of you if your son had some good independence skills.
- He does have diagnosed ADHD, but thanks for the advice, will definitely try this.
  
  I can sympathize, I was a nightmare for my parents growing up not being able to sleep. Though I usually was caught reading or playing video games instead. ADHD can be very hard to deal with and I wish you the best of luck

I did this when I was around the same age as your son. I remember knocking very often for a certain period of time, then at one point I just grew out of it. I would not worry too much about it, if there is no other serious topic that could be a reason for the behavior.

I feel like you might be over-thinking this. If it's a recent thing then it's most likely just a phase and he'll grow out of it when puberty kicks in. One my best friends has an 11 yo and a 4 yo and they both end up in their parent's bed pretty much every night. There is nothing weird or unusual about a child sleeping in the same bed as their parent/s, no matter what internet hacks try to tell you.
- This. You're not causing permanent damage to a child by letting them sleep in your bed. You don't need an academic answer on what research says about this.
  I don't like it because my kids kick and move around, so I don't want them to sleep in my bed.
  The main advice for parenting should always be "you do you".
  
  Sorry, but that's simply not good advice. Nobody is born with perfect parenting skills and is granted all the answers. In fact, many parents are not fit to raise kids at all, others are simply overwhelmed and need help.
  It's very easy to have a kid, not particularly easy to raise one. The idea that all your decisions are magically correct and sound just because it's your own kid and that every parent knows best is simply wrong. It's healthy to doubt yourself and to ask for advice.
  Also, parenting science is not quackery. This is an actively researched area and there are real scientific efforts to better understand child development with respect to biology, psychology and neuroscience. These efforts do lead to a better understanding of how kids can be raised and how certain parental decisions might affect a child.
  Personally, I'm happy each time parents try to inform themselves and seek the advice of others. That doesn't necessarily mean relying on the answers a bunch of strangers give on social media, but I hope the Fediverse as a whole can do better.
  Right now, I can't make the claims you did in your post initially.
  You're not causing permanent damage to a child by letting them sleep in your bed.
  I wouldn't know that. Intuitively, I do believe that co-sleeping would have a lot of benefits up to a certain age, after the infant stage and dangers of SIDS have passed. However, I could easily imagine that there might be adverse effects after a certain age. Would it be likely to occur after a handful of times? Probably not. Are there any indications on the threshold maybe? Anything to look out for, given the kid might have anything else going on? Maybe. All information I would have on that subject would indeed be anecdotal though, and so in turn pretty useless. Why the dismissal of an honest attempt at getting educated?
  I would indeed argue for getting an overview of what science has to say on the matter and then making an individual, informedndecision based on all the additional context I'd have as a parent that I could never cram into a couple of posts on the internet.
  Having access to scientific publications, I'll see if I can provide some material later.

I have experience with this. There is nothing damaging about co-sleeping occasionally. The risk is either of you becoming dependent.
A 27 year old single mother, if I had to guess, doesn't plan on staying single forever. At some point a significant other, once properly introduced, will be staying the night and your son should not be a part of that.
The other issue I see here is "it's kind of nice not having to sleep alone every night." This does not strike me as healthy, especially when he stops co-sleeping.
Ultimately, you are the adult, and you are the caretaker. I would highly recommend getting your son a regular therapist to guide you through this.
- What's wrong with that statement? I feel like I prefer not sleeping alone as well but I don't have a problem when I do it.

I wouldn't worry about cosleeping affecting their development.
\ The only things you have to worry about is you both getting enough sleep, and any shame or embarrassment they have about cosleeping.
- Honestly I felt like I slept a lot better lmao

If it's just a few nights, I wouldn't worry about it.

Why do you think he is asking to sleep with you? I know you said it's because he "can't sleep", but you can also just not be able to sleep in your own bed.
When I was a child (and even sometimes as an adult), I would get scared at night. Yeah every 2 year old gets scared at night, but I'm not talking about age 2. I did it my entire childhood...even when I got to be a much older child. I'm talking as old your son and then even older. When I would get scared at night, I would go into my sibling's room at night and sleep on the floor. It happened frequently. I did eventually "grow out of it" as another user stated and did it less frequently as I got older.
It might be embarrassing for him to talk about and he might not want to admit it, but do you think it could be something like this?
I'm 30 now and thankfully don't have those problems much anymore (and I live alone so there is no one to sleep with lol).
- He tells me he gets scared at night as well. He also has diagnosed hyperactive ADHD which might make him restless at night.
  
  Might consider trying a weighted blanket
  
  Ok yeah I suspected a bit as much about the scared thing. Honestly I'm not sure what sort of advice to give to help out for that sort of thing. I never told anyone that I got scared at night...just lived with it until it eventually went away.
  For me, personally, something like a weighted blanket would not have helped with me being scared, but yeah might help with the ADHD and restlessness part like the others stated. Dunno.
  A quick Google search leads me to find out that this is incredibly common even in kids at the age I was and the age your son is. So at least what is happening isn't overly concerning as something abnormal if that at all helps.

How cares what people say, just do what feels right.
Don’t underestimate the need for physical touch. Most people are starved of physical touch, rather than having too much of it, especially males.
Male teenagers will stop sleeping with parents once they start masturbating, so your problem is going to be short-lived.
- Male teenagers will stop sleeping with parents once they start masturbating, so your problem is going to be short-lived.
  ...or you're going to have a completely different more terrifying problem 😱
  
  Lol. This is not porn

If it's not causing any issues, don't worry about it. If it seems to be causing a dependency or increased anxiety around sleeping alone, then maybe it's not a good idea. There doesn't seem to be any consensus among psychologists. Some like it, some hate it. So the best you're going to be able to do is keep track of how it affects you both and change things up if it becomes a problem.

I'll just put this out there: Would it feel less weird to you if it was your daughter?
Anecdotally, I had a friend who crawled up to cosleep with her single mom even as a teenager and student sometimes. Especially when she wasn't doing well. Being a family of 2 brings you very close together, and also unfortunately, makes you the only super close person in their lives. She liked to cuddle up with friends too occasionally. It never seemed off or weird.
She might be hypersensitive (although this is not a recognized diagnosis), but otherwise, she is developmentally (and sexually) absolutely standard. She's 33 now and does very well in life and with her boyfriend.
What I mean by that is that it might seem more unconventional to cosleep with someone of the opposite sex who is starting puberty. Being a girl, having a girl friend, and this girl friend liking to sleep with me, another friend, or her mom as company was never weird. All other friends also thought that's fine. I think that's that girl privilege where we are more comfortable with closeness. So, if you felt weird if it was your daughter too, it might just not be for you (although you mentioned you slept better). If it's about the gender (some subconscious bias), it's still your child. Just your child.
Last but not least, there are more than enough people around the world who share a room or even a bed with family members until a bigger age. A friend of mine coslept with 8 silblings since there was just no room. Especially with a voluntary cosleeping situation, I would rather try to focus on the benefits it gives you two - closeness, connection, a feeling of safety, and knowing you're there for each other. Also through changes in life.

I mean, I'm assuming your kid knows he's going to be a teenager soon and what that means. You can just talk to him about it like a person.

I don't think it'll affect him negatively. It will be good to know why he wants to sleep in your room, so you can know if it's something you need to fix. If it starts to get uncomfortable you could let him sleep then take him to his room once his asleep (provided he's not too heavy).

My parent spidey senses are tingling. Besides the ADHD, is there anything else happening in his life? Major life change (changing school; new friends, etc)? He may not feel comfortable vocalizing yet if there is in fact something affecting him
- Now that you say this, I had a talk recently with him about me wanting to date again and the possibility of a stepdad
  
  Bingo

If you're afraid it might cause a problem, maybe you could try to say no one time (ideally at some time when you sense it's not that important for your son, like not during a storm or after nightmares), just to see if that's ok for him, or if that raises problems.

seems unusual, at 13 i already hated sleeping with a family member in different beds, because he was constantly hovering over as a "helicopter parent" who he thought took it upon himself.

At 12 I kind of doubt any mind-tricks are required. If the kid wants to cuddle why not?

They're too old for that.
Find a way for them to sleep on their own, you'll need to say no and mean it. No matter the waterworks that may follow.

Edit: at what age did you have you kid?
Sorry for the edit, I just realized your son and your age and it raised some questions... I will put back my answer once this has been clarified ;)
- .........27 year old mother with a 12 year old kid equals 15
  
  .........27 year old mother with a 12 year old kid equals 15
  Thx a lot......... captain obvious. I wished for the op to answer the question themselves.
- I had him when I was 15!
  Edit: No worries, most people are usually surprised when they find out I’m a 27 year old mother with a 12 year old child.
  
  No worries, I just wanted to make sure there was not some mistake. Here is my edited reply:
  Two things:
  why can't a teen not sleep? At his age, the body needs to sleep because its constantly growing and changing. That would be the first thing I would try to understand and fix. And if it is something the kid is not willing to discuss with his parents, which is ok too, maybe with someone else they can trust.
  if you have discussed with your son and there is no ambiguity between you I would just make sure that you sleep under separated sheets or whatever (he is not a little baby anymore and the body of a teen boy can react in ways neither you or him would be willing to see happen), provided you made it clear this should not become a habit because sleeping with mom may not be the best way to develop good sleeping habits.
  Hope this helps.
  (end of the edited reply)