Have you tried counseling? I have no experience with abuse, so I'm sure I don't understand all the ramifications. I do think that you might be pushing your luck a bit expecting him to be satisfied with when and how much you want to have sex.
I could see how sex might feel like a power struggle and not very enjoyable if you had been abused. Still, I would think this would be something to try and resolve before getting married. Perhaps, I don't understand.
