So there is this girl in class that sits across from me in college that im interested in. But she seems like the low energy type somewhat reserved but sexy voice, and we don't really talk to each other outside of we are in the same class. I know i can get her number since its not really hard to get one, but what would be a good way to approach her since we don't really see know each other and she is in-and-out of class since i don't want to come off as overbearing.