Reading your posts has taught me a lot about patience that is not within my basic nature. In some of the most recent posts, I see a more reflective focus than thoughts about the future. Perhaps that what year ends are about for some.
I am reminded about the section in the Book Future Shock on stress points. Your wife's medical issues coupled with your own strong feelings of sexual/intimacy loss are probably giving you quite a few stress points.
May I suggest that you find some time as the care-giver in your relationship for you? Allow yourself to also think of some happy things you can do in this coming year. Depending on where you live, there are social agencies that provide family care-givers a needed periodic break.
Good luck
>43 years of marriage--My wife and I are now closer than we have been in decades. I believe that my SSM is over.