Hi Lack-
I'm going to fix this for you right now, I hope.
I am a 58 year old female that has had an almost perfect 24 year marriage. When we first got together, we had endless fantastic sex, then after a year or two, can't remember exactly, it all cooled off and my wonderful husband was in your exact spot. He was wildly oversexed and it really bothered him, but he stayed absolutely faithful. It stayed like that for several years, sort of a routine thing at least once a week, and for me oral sex was the only thing that worked. I've never had an orgasm with intercourse.
Then we got down to the really scary business of "talking about it". Eek. That's pretty much the last thing either of you wants to do, but it's gotta be done. I finally, after wasting all those years let him know a couple of things to try, and he put my worried mind at ease by letting me know he was WAY more than happy to do them, and our sex turned fantastic. I'd been scared all those years to say what I really wanted.
It was so fucking stupid of me to wait, because right when we had reached a whole new level of experience, he was diagnosed at 52 with terminal prostate cancer. The incredible sex we finally had started having, where for him eight times in six hours started being the daily goal, stopped the very next day due to the horrific testosterone-removing drugs he was started on. A normal PSA is below four at the highest, and his was 511. He would've been dead weeks later if I hadn't forced him to go to the doctor.
So for the last seven years it's been all memories and even holding each other is hard because we so badly miss what we had. But he's alive and that's all that matters.
Now looking back, had I had any idea this was a possibility, I would've gotten that stupid talk out of the way immediately and just DONE what I needed to do to get it all going again. I die a little more every day knowing I wasted all that time.
What I want you to do is, tell her this story. Make up some friend or something since she's not going to be thrilled you're on here telling the world about it. Tell her you just found out this horrid thing happened and how bad I feel. Tell her your friend was crying when she told you about it, because I am.
Then go have that talk.