I know how you feel. I have yet to make any friends in college, and I've started my Master's. It's very difficult to keep friends from high school; you and they are still maturing and figureing out who you are, and people can seem to change alot when you haven't chosen the same path. It's very likely your friends don't think that they have changed; they probably think you've changed.

You're in no way alone in feeling outcast...