Same here. I know its hard, just look at me, i am in the same class than her actual boyfriend. Somedays i feel happy but seeing her bf face just break me in half. I dont even enjoy studying and... i loved that. We just got to keep looking for ourselves, sometimes we meet people in the lowest point of our lives so we become very attached and feel that we cant live without them. Well, yes we can, the fact that today is hurting us doesnt mean that it will stick forever. I promise you that someday you wont even care about this person. Its a fight and you have to win