Ok, so there's this girl at my university who's in like 3 of my 5 classes (she only really goes to 1, because the prof in the other 2 is really bad). I talked to her briefly on Monday (we got essays back, I asked if she knew when the prof's office hours were and we just walked and talked for about 5 minutes) and got her name. How do I re-approach her without seeming creepy, because not talking to a girl for an entire semester and then talking to her a few times a week might come off as a bit weird, no? And I was a bit discouraged because after one of our classes we were basically walking besides each other for about 5 minutes, I didn't acknowledge her or vice-versa, I just didn't have anything to say and didn't want to seem to eager. Any advice?