To sum it up, last semester there was this super attractive girl in my class. I sat behind her and I occasionally held the door open for her, etc -- but never had a conversation, though I'm positive she knows I exist. Also pretty suuuure she doesn't have a boyfriend.

Friended her on Facebook a few days ago (my best friend is mutual friend of hers oddly enough) and am now wondering if it would be weird if I messaged her via Facebook and say something like:

"Hey, I think we were in a poly-sci class last semester." and then somehow lead it to "Hey, would you like to get coffee at some point this semester?"

We still go to the same university, but I'm not entirely sure if I'll run into her again. Odds are pretty low, in my opinion.