I used to have the opposite problem: I love giving oral to pieces, she didn't like it one bit. We broke up for unrelated reasons, but in retrospect I regretted staying in a sexually unfulfilling relationship for so long. Life's too short IMO.

I think it's ridiculous how a lot of Redditors go "He looked at you funny... once... in the 10 years you've known him? Red flag! Dump him girl!" on subs like this.

But you may not have a better option than breaking up, assuming opening up the relationship is off the table. Sex is most definitely not some small detail that can be overlooked. It's also not really negotiable. You like what you like, you dislike what you dislike, and no-one gets to choose what their libido is like. Trying to push people towards sexual preferences they don't have rarely works and is in poor form almost by default. I hate to be the bearer of a pessimistic outlook on your relationship, but this is how I feel.