Beast with-in!

I am going on 20 years of married to my high school sweetheart. Over time her health has not been the best, she has vaginal issues that make foreplay-masturbation-oral-intercourse not 100% enjoyable for the both of us. This leaves me high and dry on the intimacy and sexual side of our marriage. I am Physically, Mentally, Sexually, attracted to her, I love her. And she is the same with me. It's just, that sexual drive for her is coming to a HALT. Only leaving me more sexually frustrated which leads to some un-loving feelings to her. I don't want them feelings towards her in any way.

I GET IT! She has an issue, and I am very sorry for her pain-discomfort. We have had the Doctor talk for a decade now. I'm just done with the talking. She nor her doctor wants to do anything about it. We've had long talks, but they are just talks.

So I am left in an area that I don't know which direction to go?
The longer we go down this path the more my sexual hunger increases. I've done good keeping it contained BUT I just struggle holding it back anymore. And I think nor do I want to hold it back any longer. I have a b**st within me that may crush my marriage or strengthen my marriage.

I'm not wanting a; wife, fiancé girlfriend. I want a woman that enjoys clean safe sex. Also know as Friends with Benefits, Fuck Buddy, Slut and so on.

Please reply if you have any suggestions!