Even if some people don’t turn into friends, people aren’t going to be jerks like they might have been in high school. Everyone is pretty nice toward one another, for the most part. And especially the first few weeks of school, everyone’s going to be pretty friendly toward one another and try to make friends–and that’s where you make your move. Seriously, I had the same fears you did; the making friends part was my #1 fear about college. But I put myself out there and made myself join clubs and talk to people as much as possible. It works. Don’t just say hi once and expect that to do the trick; you have to continually talk to people and make an effort to spend time with them.