Your problem is you see "them" as the cool people, and don't see yourself that way.
I gave that up when I left highschool, and went to Warrensburg. I was in the so called Honors dorm... and was surrounded by what you might call nerds. It was coed, which was cool.... but it only meant you had both male and female nerds.
In that enviroment I was the partier of the group. My buddy Matt and I'd run up and down the halls, bangin' on doors... tryin' to get those bastards to go down to Pine street with us.
Sad thing is... we partied alot, but neither of us came back the next year. It was easy to predict, and I'd change it if I could. BUT... I learned how to have fun. That's a pretty good thing to learn, if you wanna lead a happy life.
Once you get outta highschool.... there is no "cool" anymore. If people like you, great! If they don't? fuck 'em. Why should it matter to you? Get some balls and go out. Somethin' will happen.... you'll have a great time with the guys... get some good feedback from a girl... (god forbid) make out with some chick.... and then you'll be hooked. Star Wars and Chiefsplanet aint got chit on that.