Why does the girl I like ignore me?

Anonymous
There is this girl I like since last year but I still haven't got the guts ask her out because I'm just scared of rejection. Last year(junior year) she was in a couple of my classes and she used to talk to me often and I knew that every time I looked away she used to get a glimpse of me. But this year(senior year) she is again in a couple of my classes and since the year started we barely talk to each other, when I talk to her friends and she is right there it's as if she doesn't know I'm there or something and when we are walking in the hall I know she can see me but she acts like she doesn't. I REALLY want to ask her out this year but I'm still afraid she'll say no.. The only time we ever talk is when I talk to her first about homework or school related stuff?... SO I need to know why is she ignoring me, does it mean she doesn't like me?

ALL this is driving me CRAZY!
Updates
+1 y
I overheard her saying to her friend that she has a crush on someother guy, but I'm not sure It was true or not. the guy she like(I think) already has a Girlfriend. The girl I like and him talk a lot and now I find it harder to talk to her..
Why does the girl I like ignore me?
4 Opinion