I assume you're quite young, which is great! I'd suggest learning to enthusiastically jump into whatever activity you wind up in. It's way more fun that way.
At a comic con? Throw on a mask and start talking in a funny voice!
At an opera? Listen closely to the sounds and try to enjoy the artisticness of the performance!
In a big grassy field with nothing to do? Take your shoes off and let the grass tickle your feet!
In my experience it's easy to judge things as lame and to tell yourself that you're too cool for that thing, but that winds up not being fun, and you wind up missing out on a lot of stuff that you actually would've enjoyed if you let yourself get into it. Learn to be open to trying new types of experiences and you'll wind up having more fun in life!