I also experienced this in college. Detached and disconnected. For myself its because I have schizoid personality disorder due to my up bringing, the abuse and dysfunction. Its really unfortunate that this is a product of such a childhood. But that doesn't mean you can learn social skills and how to interact. Try reading books about it. I'm sure they will help. I'm reading one on overcoming social anxiety (which I also suffer from) and gaining social confidence. Try attending clubs where you can meet like minded people too. I did that as well in college, even if I was shy and sat away from everyone else during meetings. Afterward I would cautiously mingle until I felt comfortable.

College are some of the most fantastic years of your life. I know you'll make the most of this time. And really, I'm not in contact with anyone I knew in college...not because I dislike them, but people grow apart. People always come and go. That's just life. For me, anyway. I truly hope you can make a deeper connection with people.