Notjustaprettyface My suggestion for a holiday/break away from your grumpy OH is the last paragraph here. Feel free to skip the rest!
My husband died (not passed - a nod to another thread) in 2008 and, over the years, I've told myself I should have a holiday. I never have because it would seem an awful waste of money to travel abroad, solo, and spend time reading or browsing in shops when I can, and do, do that right here at home. I've never been interested in museums, churches or other historical buildings (actually, I did enjoy the Alhambra Palace tour but the tour guide was extremely good looking!) and admiring lovely scenery (other than handsome tour guides) only interests me for a few seconds. I've also never been interested in beaches (hated them as a child) or boasting about far flung places I've travelled to.
When my husband was alive, he wanted a complete break from work, so we went abroad (hence the tour of the Alhambra). I would be counting down to the midpoint, when I would tell myself, "Right! We've broken the back of it now." Then I'd be counting the days down till we could get on the flight home. I think I just wanted to be in control of what I did and where I went, rather than ' trapped' in that holiday place.
I think I might be unusual but maybe some other GNers feel the same?
So, Notjustaprettyface maybe a complete break away would be good for you because you'd be 'trapped' and out of physical contact with your grumpy OH. You could make a plan of all the sightseeing, activities Hey! An activity holiday! Yoga perhaps? etc. Make sure you have books, a kindle is great for that. Google your destination to find out what you can do there. I once considered a flamenco holiday and I've often considered a yoga retreat but I can do yoga here, of course, so I've never put any of my ideas into practice.
Good luck!