Hey Kiddo
I know very much what it is like to quit drinking on a college campus. Not easy. I tried to quit many times between 22-26 for the same reason you did but I always ended up back on the bottle. Fortunately, I feel like most college campuses are "getting it" and starting to offer plenty of fun sober events.
For me, quitting now is easier because the campus I'm on is nearby a major city, so I can easily leave campus and go into town. It would be much harder in a small college town, like Ithica or East Lansing, I know.
You can do it! Just remember what you're fighting for.