Hey! I'm 24 and am two weeks into sobriety. Also a college student. It IS hard when I'm in the "college drinking phase" and it's difficult for others to distinguish the problem that I know I have (and nobody knew the extent of my drinking...) vs. simply being a wild college student.
I was really, really afraid of losing all of my friends (I did lose all of my drinking buddies), but I have made so many awesome friends in AA. There are a lot of us out there! I was expecting everyone in AA to be older, but it's just not the case. Even if you don't think AA is for you (I don't know, but you didn't mention it), you should check it out and at the very least, maybe you will make a few sober friends! They have young peoples' meetings as well, look for them. I go to a young peoples' meetings on Fridays at midnight and it's always a good time! I don't feel lonely like I thought I would at all.