Lil

where the thought of having sex with my bf is feeling distasteful... I can't remember what I like about sex

Take those thoughts of how you feel, Now apply them in your minds eye to that distastful feeling and add being made to feel like you had to have sex when you do not want it. Not once not twice but so many times it becomes a action of hate not love. Through in the resentment that builds around that the he does not care about me or my wants and needs. And anger at being used as a object to get his rocks off. And in time it will feel like being raped by your own spouse. No matter if you say yes so you stop bothering me but I have no interest in it. Or if you outright say no.
While he is in sexual fantasy land she is in hell. Or in a different fantasy land. Hmmm if I could cook mushrooms for dinner and add a few of the deadly kind could I get away with it.

It will take her a long time to stop seeing herself as his victim and will only happen if she sees she enabled him to be her demon. But once there where do you go.

You still have to have time to forgive and heal which wont be easy to do . Which means more down time to the sex life which means he may not be able to control his behaviors