I'm stunned by the amount of men with potential / real ED issues that do nothing about it... Viagra is available over the counter now, so no need to visit the doctor (although I'd highly recommend that they do - there might be other issues causing ED).
Maybe it's the potential embarrassment of buying it?
Loss of libido in / after menopause is common. HRT can and does help, but it can take time to find the right HRT.
With either of the above, the person in question has to want to continue having sex. If that drive (and I don't necessarily mean libido here), isn't there, then the person won't see not having sex as an issue.
My advise to everyone is, if you haven't done so already, to get your partner alone, and have a long, open and honest talk with them.
Let them know how lack of intimacy is making you feel, and ask them how they feel - listen to them. Ask if they would consider couples counselling. If you can't exist without intimacy (and I know I couldn't any longer) maybe ask if they would consider an open marriage.
If none of that works, then I think you have to decide if you can carry on living in passionless, sexless, intimacy-less relationship for the rest of your life.