Brother is a pain and I can't stand to be in the same room as him

My brother is a pain and I know everyone thinks that but I cant stand to be in the same room with him hes ignorant controlling and demanding he gets in everyones buisness hes cocky and arrogant the other day it went so far I stabbed him with a pen I cant stand being in the same room with him and my parents dont do a thing about it and normally its just me and him and he can over power me a lot so I cant fight back what can I do

yr honestly giving him too much attention, people like that only react to how people respond to them, if you dont react to his b*llshit, then you render him powerless, dont submit to behaviour like that, but dont be apart of it either, he sounds like a spoilt brat
It will be hard, but habbit is one of the hardest thing that we as people need to learn to overcome, sounds like he needed a kick up the behind...years ago. goodluck

I agree with chosen_few;
Try your best to ignore him. He'll probably be relentless and increase in annoyance at first, but after a little bit, he'll give up.

And just think about the future, eventually either you or he will turn 18 and move out, so there is good to look forward to.

start trying to have sex with him instead of arguing with him trust and it will work

Tell your parents they need to step in before things get worse - you're already stabbing him, who does what to who next ? - seek help !!

ok the person telling me tp try to have sex with him instead what the f*ck does incest mean anything to you and is just plain wrong and gross