PJ_: I've read some of your other blogs and I feel for you. I think that when a person starts feeling this way (as I have in the past) it's a very difficult situation to get out of. I might suggest that you try to join some kind of club at school to meet people. I don't mean the Glee club or some such - God forbid! Something nice and quiet and sedate. Perhaps volunteering your time, if you have any, at some local charity/shelter. Perhaps getting a some side job on campus. These activities would force you into more social situations from which other social "situations" could stem. I don't know what you've got going on in terms of free time, so my suggestions may seem ridiculous.
It amazes me in this day and age how many people I know who are so terribly, terribly lonely. I am one of them at times, although I admit I have a MUCH better social life than I did 15 years ago when I was starting college. It's so hard to meet people, and to break out of the shell we build around ourselves. My fear kept me from meeting people, but eventually it happened.
I invite you to join the #joeuser chat room (if you chat), though I admit not many people hang out there and it's pretty dead in the evening (past 6 pm EST) and weekends. I'd be happy to say hello in person, but promise not to torment you with constant questions about your state of mind.
http://zoomba.joeuser.com/index.asp?AID=73899 (Article about the chat room, if you need it).