I’m so mad at my fucking brother

so me and my brother got into an argument like a month ago because he missed a day of school. he’s 19, i’m 20, his gf is 18 i texted his girlfriend and said he needs to go to fucking school and she said he was sick, and if it’s a problem to “text him about it because just because we live together doesn’t mean she’s the problem of why he goes to school” and she tried to say they’re both adults and i don’t have to mother hen him over one day being missed since he was “sick”

so i told my brother that i don’t care about his girlfriend and he tried to GUILT TRIP ME and say that i’ve been picking on her since i met her and i was like don’t play that shit with me i don’t care. so i told him i don’t give a fuck about her unless something bad happens to her and he thought it was OKAY TO GET MAD AT ME ABOUT IT saying “you dislike her for no reason, when your boyfriend has cheated on you and hurt you in many ways.” and tried to tell me she’s cried from how “bad i treat her” i don’t care like you can’t fucking force me to like someone like i don’t care.

and he’s like “itsprobably because of her skin color, because you’ve said the n word around her knowing it hurts her” like i’m not walking on eggshells around her

anyways, i needed 15 bucks and i asked him for it and he told me no and i am upset now because it’s probably because of his stupid girlfriend.