If you are worried that you wont have anyone to hang out with when you get there, just remember that everyone else is feeling that way too. Sure, some people will have a social group built in if they are from a nearby highschool, but there will be countless people on your floor who know nobody else when they arrive. You wont be alone for anything your first week, as you will probably end up going everywhere with a group of 5-10 people. Leave your door open and you will make lots of friends. The one exception is if you are on the end of your floor. If that is the case, walk down the hall and meet people. If you want go get food, head down the hall a few min before most people will go and see when people are going, otherwise a group may go and forget about you. That happend to a girl on my floor my freshman year (I found out the next year when I became good friends with her). She thought my group on the other end of the hall near the elevator was very clicke, but really we would just leave to do stuff and not walk down to her end. The great thing about college though, especially at the beginning, is that anybody can be friends with anybody (except the jocks and nerds of course).