Hey, me in 2004-2008, you know those guys you kind of try to avoid because they look 'uncool'? Yeah, get over that shit. They're awesome people and you'll regret it if you avoid getting close to them because it'd hurt your 'rep'. The whole rep thing will mean jack shit in a few years anyway, so just join them, and talk to them. Trust me on this. Oh, and you know that group of childhood friends you've made through grade school? Stay with them. Keep in touch with them. Do NOT let yourself grow distant and then start avoiding them. You are weird and dorky and odd and silly. That's fine. They don't mind that. They still accept you. If you don't, you'll go from 8 people who accept your nerdy, dorky self to 1. And you'll start growing distant from him.
Just trust me on this. Please. Don't try to change to look "cool". It's not worth it.
Also, when you move, and if you didn't take my advice, make damn sure you have the contact information of what few friends you have left and don't let you all grow apart. Same goes for the friends you make at your new school. Seriously, trust me on this. The new people you meat are good people, and you'll regret the hell out of it if you stay so distant from everyone.
Oh yeah one more thing, this is less "heavy" so don't worry. In 2007 you'll meed a group of people on Xbox Live belonging to a clan called "DOA". Do NOT change your XBL username! Your friends will leave the clan the next day and change their tags. DON'T CHANGE WITH THEM! You'll still have it all the way in 2013 and you'll look like a jackass.