PJ,
I have the same problem with the girls, it might be genetic. The whole thing is you have to turn off that part of your brain that says "I have nothing to say besides, I noticed you." and just talk. Say the I noticed you and then take an interest in her, share anticdotes, smile laugh. Unless she shreaks and pepper sprays you the worst that she can do is hint that she isn't interested in talking to you. Worrying is like sitting in a rocking chair, it doesn't get you anywhere. DON'T delay, be reactionary, she doesn't know you and initial conversations are superficial. It's breaking the ICE is what that first conversation is about, even if you don't have much to say, you can always use the people you are with as an excuse to make a quick exit and leave her wanting more. Then if you see her again(i went to a smaller college than you so I saw just about everyone once a week) you can have her name and you can talk to her about something you thought about while you were not with her. I got to go eat some dinner. You may think its stupid but don't over think it and don't worry about it. Like Nike in the late 80's early 90's just do it