Have you tried to initiate a conversation or smile at someone?
If you aren't comfortable joining the gay group on your campus, find something else to get involved with. Volunteer to work the stage of whatever theater group you have. They always need hands and you may meet a cute gay actor.
Find someone like a prof or adviser to help you hook up with some group. There are dozens of ways to make the four years fun.
If you can't be an athlete, be an athletic supporter.
Look at any groups the school has to offer. I had the same problem until I joined a choir and was soon hanging out with people every day. Maybe even try to get a part time job, especially if your school has student employment options. You have to push through some awkward moments, but you'll meet people soon. Many people around you probably have the same problem. In what area of the country are you?
[quote]If you can't be an athlete, be an athletic supporter.