New School, New Me
It's awesome that you are outgoing, but it would be amazing if you could open yourself up. That way, you could meet a wide range of people. Forget the cliques, and treat whoever you meet as an individual. You learn more about yourself by talking to different people and by learning different things. You shouldn't worry about being classified into any group since you are an individual. Remember that talking to a prep does not make you a prep. Join an after school sport, club, charity, association or whatever to meet different people.
When I was in high school, I had the same fears as you when it came to associating with a specific group. Now, years after high school, I wish that I had been more open and talked to everyone. Whenever I did talk to people who were different from me, I ended up learning more about myself through our differences and even through our similarities. The more open you are to meeting different people, the better your chances are at finding places to eat for lunch, having friends to hang out with on the weekends and with learning about a lot of different things.
<3 Sherryn D.