Hand-Me-Down Girls?

So I...sort of kissed Lu yesterday. It just kind of...happened. I'm not sure how to explain. Tuesday she asked me if I would teach her a little about soccer, and since it's soccer, I totally agreed not realizing it was almost like a date--they guys said so, but I think they're full of it.

Anyway, yesterday we met up again because she said she wanted to practice dribbling more--and she's really awful by the way. Afterwards we were went for ice cream--she likes mint chocolate chip, just like me, and...i don't know what happened but we totally kissed. I'm kind of freaked. Should I call her? Or not call her? I mean, she was just dating Danny! Can nerds be sluts? Or is something there? But she's not even cute and I don't want to get involved with girls! Argh! I don't know what to do...