I don't really fit in with my friends... :/?

Okay guys, so I am 18 years old. I am a girl, (not to sound conceited but...) I am pretty. I have amazing friends but sometimes I feel like I don't quites fit in with them. I have very high self esteem so it isn't that I have low self esteem and think badly of myself. It is just that I am preppy, very girly, every hair has to be in place, I pride myself on the way I look however, at the same time I am very different from them. I am smart and I love star wars, psychology, and I am very into conspiracy theories and aliens and the paranormal. I don't nessecarily believe in it just really interests me. Sometimes, I feel as I am just too different from them. I'm not sure what to do about it.