I think it's very strong of you that you've come to this point. No one can accuse you of not having tried, at any rate.
I hope you'll find the way of life you can be comfortable with. Just remember that sometimes things aren't what they seem... and sometimes things are not as bad as they seem.
I have never really tried to fit in; I guess I should consider myself blessed for having grown up with quirky relatives and eccentric friends. Being weird has always been my norm.
But I can relate to what you're saying here. Especially in the last 3 years or so, I've found that I was feeling somewhat guilty when I'd misunderstand certain social patterns- almost felt as if I were broken or incomplete. But I've learned -sometimes to my pain- that people can say one thing but mean the other, that thay can be hypocrites, sadists, manipulators. And that's not the crowd I want to hang out with, nor the kind of behaviour I want to emulate.
Beside those negative experiences, I've also had many people tell me that I should go out more, socialise more with other people, find someone to share hobbies with, be more social in general. I tried, and it just doesn't feel comfortable to me. So I stopped trying to be a social beast, and now I've never felt better than I do now, walking my own road.
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clarity of thought before rashness of action