"And the monkeys feel alone. All six billion of them."

I would suggest trying to go out and meet people- how you feel is personal. While you may feel that people don't connect with you, the truth may be, because of how you see yourself, that you don't connect with them.

Don't focus so much on "fitting in" or not, just get an education, make yourself known, meet people, talk, play, chat... Chances are you're self-perception is not how others see you- maybe they don't go out of their way to approach you, because you already expect they won't.

What I mean is, if you're already shut-down expecting people not to like you, you're unapproachable. People aren't going to come knocking down your down if you come off as a loner to begin with.

Relax, have fun, and forget you're "different" because probably no one else thinks so.

Have you tried joining any clubs or something like that? You'd probably find people who share a lot of the same interests you do.

just stop hiding yourself

even though there is a big gap in our ages, i must say that i feel like that too. i too have changed schools, more times than i'd like, and i'm haunted by the same worries as you. it's hard at the beginning, it always is, but the advice on joining groups is a good one. also, try to talk with people outside classes, if you don't want to compete during lessons. i find it hard to, but since you are a so-called "grown-up", you shouldn't.

i just hope i helped a bit...

What do you mean by feeling isolated?

Isolated as in, not making friends?