new girl i really like

[Resistance]

So, i got over some other bit** now I really like this cute girl and we talk have some classes with her, its really awesome. I want to tell her that I like her, but once she asked me if I liked her, but we were talking with other people around us, I acted like "what?" in a joking way because I didn't want to tell her like that on the spot. Then one time in a class during a test, (this is pretty random[I have glasses so I cant see as far as where she was at] she was staring at me all the time, so I was stared at her for a second and we both laughed, don't even know why. I have a serious feeling that she likes me, but I don't know if its too early to ask her, but on the other hand I don't want to wait too long. Help pleaseeeee?