I can't stand my brother anymore
What did your brother do that makes you can't stand him.
He steals my food most of the time. I don't like the way he deals with me
Sibling fights are pretty common and it's okay if you are mad at him sometimes but he is still your brother and you should try to work out the differences. Sometimes it is all just a misunderstanding and can easily be resolved if you give it a chance.
I can't deal with him anymore. I feel like he won't change no matter what I say to him.
Try sitting down and talking with him to set some ground rules about your food.