Here's the two cents of a 21 year old girl... not sure if it'll help your situation, but I don't think it'll hurt it any
So, is there anyone in particular that you'd like to go out with? Or are you just not wanting to be alone any longer? If there is a girl or two that you really had your eye one, why not go and ask one of them out? Doesn't have to be anything big, especially if you don't really know them yet. Maybe just a movie or something... see what happens.
I know that when I was that age, I was beyond shy when it came to guys. I would flirt once in a while, because it was fun, but then I'd get all self-conscious and hide out for a while. I wish now that I'd just had the guts to really go up to a guy and ask him out.
Then again, their were a few guys in the class that I would have said yes to in a heart beat had they asked me.
Perhaps someone you know is just waiting for you to make the first move?
Then again, perhaps you've already done that. I also knew some guys that came off desperate and asked out any girl that gave them a second look. It's not all that appealing, and if a girl notices that you've been working on all of her friends at the same time, she might not be so inclined to say yes, if you do go and ask her out.
Meh, just some thoughts... don't know if they get you any farther along or not though.