College isn't like anything else. It's not really describable. Just go into it with an open mind and an open door. One of the best things you can do for your social life in college is leave your dorm room open during the day when you've got nothing better to do. This is especially true during the first couple weeks. My first college stressed this and I instantly made a bunch of friends.
I got very frusterated with some of the people at school (small school, mostly of one major, not much variation, got on my nerves) and the lack of qualified professors so I transferred and I'm not commuting from home. Honestly, commuting is a lot different. The school that I'm currently going to isn't exactly commuter friendly. Theres not one place for commuters to hang out, we get left out of announcements, and it doesn't help that the college doesn't do hardly anything to promote social behavior (no on campus concerts or decent events - I think they had bingo last month as the big event). Socially, I'm disappointed with commuting but it has a lot to do with the school. When I was staying on campus at my other school, there was a good place for commuters to hang out, they were very active in events, they had a club (my new school has a commuter club too - but no one ever told the commuters about it), and they had a dedicated campus life director running the events.
Having fun and fitting in is as much your ability to adapt and socialize as it is the school's ability to plan events.