I'm going to get in a fight with my brother for not liking my boyfriend
Why do you think it's a good idea to get into a fight with your brother about your boyfriend?
I just want to hurt him
It seems a little silly to fight over that. You should try not to fight with your family over such little things.
No way, he deserves to get hurt.
I don't think your brother deserves to get hurt just because he doesn't like your boyfriend. Not everyone likes the same people, and as long as he isn't being rude about it then you should just ignore him. It isn't worth getting into a fight over.