You just need to give her some space. Please do not talk to her for few days. Please don't use FB for few days to avoid confusion and act like nothing has happened. I know this is almost impossible for you, but need to do it to know the real feeling of her. Be very normal and try to give her time to think about you. Be very nice to everyone in class and does not bother about songs/comments and do not listen to your friends about her attitude and all.

I am sure she likes you and she herself will come to you and propose you. I know it and believe me it is going to happen (Only if you follow what I have said.....)

ALL THE BEST....

I think you love her & she also. but dear it is too early for you to engage in love. You are not sattled first make your career & also if you love her then do not disturb her for making her career.as you says her father is no more.so it is very difficult for her to be happy.as you have your father to pay for your jeans,shirts ,books etc. for for her case there is nothing.