i feel horrible. how much of a bad person am i?

to preface, i know i sound like a horrible person.

im a pretty traditional woman when it comes to gender roles and such. i prefer to be submissive and let my man be dominant. for me, dominance is an attitude and behavior that a man carries himself with as well as what he does for his SO and his family. and this applies to the bedroom as well. in the bedroom i like to be submissive (be told what to do, have less control) while the dom is the leader and aggressive about what he wants.

well i’ve been dating my bf for two years. we have amazing sex and it’s usually pretty kinky. two days ago we were talking about new things we wanna do and he mentioned he wanted to do more ass play. when he said this i thought he was talking about me but he expressed he would like me to eat his ass and peg him. my heart dropped and i automatically became disgusted. i didn’t say anything that day but it’s been bothering me since and i legit want to break up with him. i guess to me, my view of him being a dominant man changes because he wants to be in such a submissive state and i find it uncomfortable. but at the same time, i feel horrible for feeling this way and breaking up with him over something that’s probably not a big deal to so many others.

can i get some advice? please be nice. i need rational options right now.