Sex can be mental
I remember those same feelings with my ex husband. What I had however was the loss of respect for him. It was beyond sex, it was him.
Is that what you are dealing with?
Or it could be a poor self image.
I think you are looking for a physical fix and your situation is psychological.
Serafina was right. Marriages ebb and flow. Sex can be great for some time, and then it can be not so good. If you don't feel like having sex and are forcing it for some reason, then it will never be right.
I've been married forever. We've ebbed and flowed with the sex issue, but I remember right after my son was born sex was the last thing on my mind for about 5 years. It was hard enough being a Mom. And believe it or not, my husband was unemployed for the first 2-1/2 years of my sons life, not by his own choosing.
Our son is 17 now, and the only time we do it is when he is out of the house, which is not much, believe me.
But that repulsion thing. That's pretty intense. As I said before, sex is mostly mental for women so I think there may be some underlying issues that need to be addressed other than physical.