I know exactly what you mean. I suffer from clinical depression, mainly because I don't look anything like Brad Pitt, and I have the social abilities of a potato, and thus, suffered the wrath of the 'in people', then the 'cool people', and after leaving school, it just became 'people'.
People are arse munchers. It's very rare to find genuinely good hearted folks, mainly because most of them have been chased away to hide in their rooms for the rest of eternity by those 'people' I was talking about.
This social back stabbing and tom foolery will be one of the greatest burdens of your life, and there are only two ways to deal with it.
1. Surround yourself with those few good people you do find along the way, ignore the arse munchers, twat brains and other #%@&^%s you meet along the way. If you get depressed, talk openly about it to your family or friends. Maybe even seek professional help if it gets too much. But most of all... ENJOY YOURSELF in everything you do.
2. Run away, hide, pretend that there's nothing wrong. Surround yourself with temporary 'mates' that will abandon you if it becomes too hard to be friendly to you. Even do what I do, become a drug addict. I'm addicted to weed, or at least the fact that whenever I'm stoned, I forget how much my life sucks.
Of course, if like me, you go with option 2, you will end up dangling from a rope, choking on too many pills or just plain old hating yourself for the rest of your life.
In the end, only one thing matters in this world, and that's you. So don't lose faith in the world, just start living in the parts of it that don't suck, otherwise, you'll end up like me.