I want to preface that I have not been in a relationship yet and I still struggle with these feelings. The advice I’m going to give won’t make the feeling disappear, but hopefully it will help.
For me it helps have an idea of what you’ll say to a future partner when telling them that you’re into feedism, and having an idea of what you want realistically in a relationship involving feedism. Finding where you draw the line can be helpful in easing your mind, as you can better allow yourself to see that being into feedism doesn’t make you an inherently bad person. A lot of the articles here provide really good insight on how to integrate it into future relationship. As long as you act in good faith, it will be reciprocated.
Also accept that future relationships involving this will be a trial by fire, and that you don’t know who you will find love with in the future. Thinking how the one you love will reject you and be disgusted by you is only looking at one aspect of yourself and POTENTIAL future. I can’t say for sure but it might be one of those things where being in a relationship with somebody might help change your perspective on the feedism for the better. Maybe it helps you and your potential spouse become closer.
Sorry if my reply is kind of rambly. Also some of the advice applies more to if you aren’t looking for a partner that is explicitly into feedism or even looking for a relationship. Still I hope it helps.