Bf being pushy

So I just got in a fight with my bf. He's usually very respectful but we were talking about doing anal and he asked if he could cum in my ass. We've done it before and I enjoy it but I told him I don't want him to cum in my ass bc it freaks me out & I think it would be super uncomfortable. So he kept asking me and I was like no I told you before I don't want you to do that but then he was like wtf why wouldn't you do something to make your bf happy & that made me really mad bc I feel like he doesn't respect me and he's trying to pressure me into something that I don't want to do and he said I was acting psycho which I really don't appreciate. I just don't know what to do he usually doesn't act like this it really upset me 😔😔