Hello, whoswho. Do your parents know what your brother did?

My thought is you need professional help. A therapist can help you come to grips with the emotions you are feeling. I think his being around you so much is not helping one bit. Take care of yourself. Work through the toxic feelings. Before your brother and parents can expect you to simply close your mind to what happened you have to come to terms with it in a healthy manner.

Good luck.