I wish I could give you some advice, because I remember how that felt.

I had the same experience. I was very lonely at college because I never really made any friends. I had some bad experiences with roommates who didn't even try to get along (I was out-of-state, which apparently at my college was considered a bad thing), which of course only made it worse. I tried to join some activities, both on and off campus, but never found anything I really enjoyed.

There was one thing that did help a little bit: I really liked going to the gym, because it was the perfect combination of being around other people and sometimes interacting with them a little bit without being rejected or put down. See if your college has a gym that offers free classes. Mine had pilates, yoga, kickboxing, zumba, probably more that I've forgotten. I also liked just running on the treadmill with my ipod plugged in.