Sex has never been my ' thing' ( is that it?!) but I have been married, widowed, embarked on several relationships until settling with a wonderful man 15 years ago. I was a therapist in a very natural remedy for some years. Sex lives , from the little I have seen do seem to dwindle as time goes on, but there is a rarer few for who it becomes more important. Some couples cope, or find a way- cuddling , kissing, supportive relationships, but I did see that it's very hard if you have strong sex drive and your needs are being denied, harder than if the drive goes into hiding. I also found that 'use it or lose it' can apply. I am no help here Nanaplenty, I know, but it seems a common thing- it's how you cope with it, and that's the complexities of our personalities and our needs wants and desires.One possibly helpful thing I observed was that those who found an absorbing hobby or played a sport seemed to channel some of their sexual energy away (ttestosterone?). But that's not possible for lots.
Sorry, I hope you find a way, the frustration must be soul eating.