Living in dorms blows. Don't go to any of the events/activities, they all suck ass. The walls are paper thin and the rooms are tiny, so any "parties" will have to be fairly quiet unless you have a cool RA, which will not be the case.
If you have no friends and go walking around on moving day trying to be social, don't make friends with anyone happy to be living in the dorms. They are losers. Make friends in your classes and hope that they have an apartment/house.
Don't be a weirdo around your roommate. Be clean and don't use his stuff without asking. Hope that he does the same.