I had this girl in one of my classes last semester. We didn't get to chat that much although we chatted briefly. I've got her on Facebook. She's actually really cute and I kind of want to get to know her/possibly ask her out. What's a cool way to initiate conversation? Either I could PM her or chat. And how do you think I should go about it? Obviously I would need to gauge her interest, but if she seems interested you reckon I should propose we hang out sometime?

Reason I'm asking is that I don't want to appear creepy. I hate that.
She's not in my class anymore unfortunately.
LET ME STATE AGAIN, smartass: She is not in ANY of my classes. This is a massive campus and the chances of seeing face to face are <1%