I'm not going to talk to my brother
Why aren't you going to talk to your brother?
He's been making negative comments about me behind my back.
You should speak to your brother if you are not getting along and try to understand the problems between you. If possible, try to work out your issues with him.
He thinks I'm at fault for everything and turn everyone against me. I can't stand him.
Try to explain your feelings to your brother and if he won't listen, talk to your parents. Make them aware of the rift between you and your brother because they could probably help bring the two of you together.