I don't know how old you are VinAlex (I'm 56 :-) but your symptoms sound like I think of a lot of young people in their teens and twenties, especially single guys.

I think a lot of getting use to people/teasing, etc. is both personal preference and experience. I was raised in a family of teasers so I didn't have trouble with teasing (other than it can hurt and any/everyone should have trouble with that, that's not unusual) but I can see other people responding differently, if they got more teasing than they were able to deal with or are not use to it at all, they wouldn't be able to "stand" it. That's not a bad thing since teasing is most often a negative form of humor, up there with sarcasm.

I would rather be in a big group with no one knows me personally (like online) than a smaller one in person too. But that's just shyness and self-doubt and lack of experience. I think to be pathological you have to have your radar out for such situations and spend a lot of time and energy trying to avoid them at all costs. No way a person with a disorder is going to be caught "accidentally" in that sort of position, they're way ahead of the "problem" -- which is what becomes the problem, too trigger happy for the situation so they miss out on good things and growth as well as avoiding the bad things.