The school I went to had mostly doubles (2 people), but some triples...some of my friends went places where there were 4 people in one room! They still survived.
Since the university is in your hometown, if you need to get away from your roommate, you can always spend an evening at home.
Also, I'd recommend living there your freshman year. That way, everyone else is "new and awkward" and it's much easier to meet people. Especially in the first few weeks, it seems that all the freshman are eager to meet each other. You might even find yourself kind of popular, since you know the area! You can give the others advice on restaurants, stores, transportation, etc.
Good luck!