Wife gets the "Ick" about sex...

So, I love my wife and we have had a great run (22 yrs). Our DB started about 5 years ago, but really died about 2 years ago. We've been to therapy. She has been on HRT. Nothing has changed. She is very attractive. I am in very good shape, and have had no issues getting attention or contact information from women (I have not acted on any of the contacts or cheated). So please don't come at me with "get in shape." My wife has stated that no one gets her going; not me, not actors, not guys (or girls) in the grocery store-no one. In our last counseling session, the therapist told her that she seemed not only disinterested in sex, but she seemed to have an outright aversion. My wife replied, "Yes, it gives me the ick, and I think it's silly." There has been no sexual abuse in her history.

I have reserved an apartment and told my wife I want out. She lost it, and begged me to continue to work on it. I am of the opinion that there's no coming back from someone having the "ick" and thinking that sex is completely unnecessary, no matter how much work is put into it.

TBH, I am still contemplating staying because I love her and don't want to cause her pain for something that she doesn't know how to fix. Has anyone stayed in the relationship with a DB and had any success, or do all the stories end with deep regret for staying around?