How can I deal with loneliness in college?

I go to one of the biggest party schools in the nation- people go out to bars every night, and seem to only be focused on getting drunk and sleeping around. I have absolutely no interest in drinking, and I am also planning on staying a virgin until I'm married. However, everyone just blows me off as a boring prude, and doesn't bother trying to become my friend after they realize this about me. I know I sound like I'm exaggerating, but I'm really not. I've been here for 2 years, and I've made very few friends. I've even tried going to church groups, and they're all huge partiers, too. I also joined a sorority, but I dropped out because I did not feel comfortable in the group. I'm not really looking on suggestions on how to make friends- I had a ton in high school, and I still keep in touch with a few of them. I know I'm not anti-social, I just don't fit in here. I get nearly all A's, work a part-time job, and have done 3 internships, and I'm only 19. I'm much more focused on my future career than everyone here. I still find myself in my room alone every night, and after I finish all my work, I usually just end up crying or eating junk food. What are ways to deal with loneliness so I'm not just sitting here feeling sorry for myself?