World is basicaly interconnection of people. They are the ones who create the dynamics around you, influence you, get influenced by you.
I know by very nature you are very sesitive. I however want you to be strong , get least bothered by people who affect you in negative ways, without feeling the need to bash them up or give them some ulta jawaab. Remember being quiet is the best answer sometimes you can give to people. Also God always gives you chance to even the scores.
Having said this, I want you to say that never compromise on your ambitions, principles, ability to judge right and wrong. If you feel that by not doing or havingn xyz you are being uncool thoguh doing it wont give you ny significant pleasure then remember that that's how only college kids evaluate themselves and people. Be proud for being what you are. And you are really wonderful with that great sense of humour. Keep your yourself intact and just evolve from there.