Why can't she handle it Ladies?

I'm 54 yrs old, probably relatively average looking, with a nice body for my age. Its has been over 5 years since we my wife & I have had a real ual relationship, we were married in 1974. She had a radical hysterectomy sometime in the 80s. Since then her drive had slowlly disappeared. Mine hasn't. She has been to several DR's and has tried pills and different things with no success in helping her with her non-existant ual desire. She has NO as in (0) desire for me as a ual partner. I have asked for a divorce and she doesn't want one. I mentioned me having with other women and she looked at me like I was crazy. Heck, its been since last August since I have been intimate with her, she didn't really get into it then, and that was the only time last year. When we talked she made the comment "Well I can spread them for you". Am I nuts in wanting a divorce and finding a woman that wants and desires me. Maybe I'm a bad lay.