Friend Dilemna?

i have been helping out this friend for a while now. Whatever she needed i would be there no matter what it was. My problem is that she is not appreciative and does not think of me much. This past semester it was goin well but at the end it was getting to me. I told her today that she was trash and i dont want anything to do with her. To much came out not all that i said was suppose to come out. Did i loose for her life? She was the only one i confided in but this has the 1st time i had a meltdown like this and she did not stop me. She had a breakdown but i comforted her and nothing happened. Should i care since she acted this way? Should I explain myself to her tommorow or leave and forget her?