Ok so there's this girl in two of my university classes and when I was helping a friend with directions I asked her how far it was to where I was going (we'd been walking for 20 minutes already). I would've mentioned I saw her in class but thought that might be A) a bit weird and B) I shouldn't go for it because her friend was with her. (I've never opened a set before, btw) I noticed that she had a second class with me and during the middle of class I noticed her looking over at me: a looked back over and she looked away, I looked back 5 seconds later to see if she was looking at me and she still was, I did this twice more and she was looking at me each time. I first thought she must've been just spacing out but it appears she was staring at me for some reason. Anyways I have a few questions: a) is this a "warm" approach because I know that I will get at least a decent reaction if I trade and I talk with her? b) How does a warm approach differ from a cold approach? and c) I'm confined to a classroom where I can't talk too much or too loud, any tips for how to game a girl in this situation? Btw should I go for the number the first time I talk with her if it goes well or knowing that I'll likely see her again should I wait? Thanks.