I desperately need your advise. I going crazy think about her. And it is also clear that you are obsessed with her. The love is the part about your caring for her. The obsession is the part about your desperation.
Much good can come out of love but very little good can come out of obsession.
For your own sake and for the sake of your friend I think you should find some outside person like a counselor or a therapist or an older adult you trust to discuss how you feel with as soon as you can. It is not right that your studies and other responsibilities are dying for lack of your attention. You seem to be in too deep and don't know how to handle it. You could really benefit from a compassionate guide here. I'm all for direct communication between friends and lovers, but I'm concerned that if you tell your friend your feelings right now she will get scared by the intensity of them.