People in their 40s and 50s with no children, how does it feel?

Honestly? Kinda lonely. I'll be 40 in a few months. I'm a woman, if the perspective matters .

I was engaged to the man I thought I'd marry and have kids with, but it didn't turn out to be the case, and although I learned how to choose better and what to look out for, I also wonder if I'm ever going to get to have a family of my own. It's been 6 years now since that fell apart, and I had to do a lot in that time to get back onto my feet, but the few relationships I've had since then are fleeting. Men seem afraid of commitment now, and it's hard not to completely fall to the idea that I'm just too old, which is what society is consistently screaming at me.

I don't feel old.

I am tired of searching though. At some point I will get to where I'm too old and that makes me sad to think about.