Give A Bully Another Million Chance?

So, my brother has selective mutism, bullies me sometimes (much more violent in the past though), and doesn't talk to me verbally. Sometimes, he orders me to do things that I refuse to do. In short, he acts like king of the house. He did admit to me several times that he doesn't care what I think and has no regard for my feelings.

Anyway, his behavior has been weird lately. Sometimes, he would ask me whether I want to watch a video on Youtube or exercise with him. I usually decline because I don't want anything to do with him. If I get too close to him, I can get hurt (emotionally, mentally, maybe physically). and, I don't want to get hurt again. I don't know if he's trying to bond with me??!? This cycle has repeat itself for almost my whole life (22 years or so): I be nice to him, I do fun things with him, then he bullies me and hurts me, orders me to do things for him, then sometimes he would apologize and I would forgive and be nice to him, etc etc. The cycle seems endless, until recently when I try to stay away from him as much as possible. Because I don't want to be emotionally invested in a relationship that is destructive.

So, what do you think? Should I give him another millionth chance?

Some of his frustration from his mutism probably causes some off the problmes but not all. I mean We can;t really tell you if you should or shoulden;t because we are not in that situation and see it first hand. I know that I went through the same kind of bullying but from my father, who we all suspected had bi-polar disorder. Sometimes I regret giving him chance after chance and then sometimes I was glad I did. There may also be a underlining problme besides his mutism for the reason he acts out like he dose. I wish I could give yo a defenitive answer or better help you out..

He's probably got other problems besides just selective mutism.