If its frosh week now or coming up really soon, I can't stress it enough Approach! everyone is in a good mood, you have some common ground to work with (same school, ask how their summer was, where theyre from) and its super easy to at least get a facebook contact if not (preferably) a number. If its your first year in university/college, dont worry about who you were in highschool, if you were a nerd, no one knows that in university. You are finally in control of what label you want to have, go out their and get it.