I have been talking to this girl in my class lately. Sometimes she doesn't want to talk but some days like today we text for 4 hours straight. She is very nice and pretty and I don't know if I should ask her out or not. We have some weird conversations and some very deep conversations. But it feels like when I walk by her at school its like aI don't exist. So what should I do?

If you really feel that she likes you then go for it. Better to do it than to be lead on and later told that she doesn't feel the same way about you. I'm a guy though, so maybe you should wait for a woman's advice.

I think it really depends on the connection you feel that you share with her.  If you guys enjoy each others company I would say go for it!  It couldn't hurt to ask, and I'm sure that she'd still want to remain friends with you even if she did decline.  Sometimes in work or school situations a person will ignore you due to holding up appearances--for some reasons or another--so perhaps that's all it is.  I doubt it's because she doesn't like you, but maybe she too is worried how you feel and doesn't want to seem like she's pushy either, y'know?

 

Everyone's different, but I'm sure all will go well if you're yourself and honest with her. : )  Good luck!