Pent up anger from childhood sibling rivalry | General Support | Forum

My pent up anger (from childhood) comes from the fact that my brother keeps using my computer and won't get off when i tell him to.  Then when i use my own computer and he wants to use it, he just starts messing with my computer by closing all the windows on my screen (with alt F4).  When i want to use his computer, i can't cause its the server.  I've always been afraid of my brother cause he's very short-tempered and i have gotten into numerous fights with him over the use of MY OWN COMPUTER!  We also fought over other stuff like t.v remote, etc.  This has carried on into adulthood and he just comes into my room and uses my computer without my permission and doesn't get off when i tell him to.  If i tell him to get off by pushing him off we would get into a fight which i would lose. 

I'm also angry because i would help him when he asks me to but sometimes he won't help me when i ask him to (small stuff like throwing a coffee bag in the garbage after he opens it).  I also got him this pc game one time that he said he needed urgently but which he took one look at it and tossed it aside when i got it to him (once he got home).  When i argued about that he just said "you can't bring me a game that weighs so little", he doesn't understand that i rushed to look for the game that day to get it to him the next day, which he then proceeded to toss aside like it wasn't urgent.  The problem is i have a hard time saying "no" if he asks me to do something for him and when i try to tell him that he's been using my computer all this time without permission, he just plays dumb and says "i don't remember that".  I'm a nice guy and i just want to get it through to him that my computer belongs to me and can only be used WITH MY PERMISSION! 

I also want to tell him "no" when he asks for help because i don't have to help him EVERYTIME!  He doesn't understand how i feel (I feel like he is controlling my life).  I feel like getting back at him and telling him to throw the garbage out himself or if he asks me to get him something, to just get it himself.  But then he will say "you can't such a small thing yourself?", which will make me feel degraded cause its not a big deal but it is a big deal cause he's told me to do things for him in the past and i have done it without question.  I feel like i need to take back control and do what i want to do and not do what he asks me to do!  Get in his face so he will finally understand!  Any advice would be greatly appreciated.

Thanks for reading and hope i didn't make this too long