I'm running into the same issues of having problems meeting girls at college. However, let me share something with you.
Last semester I was studying at the library, and at the table next to me was a very cute girl. I was trying to think of something clever or funny to say, but I couldn't think of anything and eventually she left. Disappointed in myself, I went back to my dorm and asked a knowledgeable friend how I should have gone about it. Here's what he said: "Just get up, stretch, and yawn. Do it naturally, but in a way that will hopefully get her to notice you. If she does, ask her what she's studying."
I actually haven't had a chance to try this out, but I thought it was worth sharing.