My brother gets mad fast it scares me

I hitting my late teens now I have a big family and we don’t have that much money so we all live so close together I have a 12-13 year old brother that I love to death he was everything when I was little me him have the same” childhood “ so I feel close to him . My life when i was younger was something I had to dad at the time so my brother from a different dad he wasn’t the best to my mother and left us on the streets at one point. I don’t like him. I know he trying to get better for his kids but I remember everything like the noises and smell on him in the past. I know I should not be crying on it because I have a older sister that remember more . But I care for my brother as long to remember I use to teach him all I knew and I was so good at it by kindergarten he was already 5 years ahead. But now he in middle school and he began yelling a lot at his games at first I didn’t care just told him to be quiet. But then he began to yell at more things I cleaning the room up he yelling at me to move I ask him to help me same thing but today I was something else. I really need to go to the restroom but I was babysitting so I told him to watch his sister for me for a minute he didn’t stop his game I look at the tv his game hasn’t started so told him again and he yell at me and then I turned the tv off and ran to the restroom but then he hit me with a box on the way asshoe. I didn’t care that much but he becoming more of a asshoe every day it scares me that he hits people fast when he mad he becoming like his dad and it scares me a bit I don’t like it at all . I don’t know what I want from this post but just to let this out I just got in to a fight with him and I feel bad I just want ti let some of the stuff may delete later ha