Inn i feel disconnected from my peers?

I am a teenage female who doesn't feel like I have anything in common with anyone. I am moving to a new sixth form which has higher grade entries. Hopefully this will mean the people are (typically) more intelligent and thus mature, because in the past I have made friends with absolute idiots. They were fine on their own until they met new people. Hello general messing about, screeching and vulgar 'jokes' I wasn't interested in. Long story short, rather than try to fit in, I became a full-time loner in the hope I would become friends with the right people.
I don't mind being alone; in fact, I enjoy being inside my head as my true self. Also, at this stage my education is the most important thing. But is this normal? Sometimes I think I should just ditch my principles and masquerade - masquerade loving vapid conversations; masquerade thinking it cool to snog whoever you can at a party and drink and condescend those who don't.
I can't tell this to people in real life, because as you can see, I end up sounding like a pretentious, miserable old bag :P But it's just how I feel.