Lena

What part of the country do you live in. Is it rural.

I do not have anything like the problem you have with your other half. However, I did go through a time when the house was driving me up the wall to say the least.
I had moved from all my family to a part of the country that I was actually born in, but it didn't help that I already had some friends there.
I then decided at the tender age of 65 to go back to work.
Went to work in a new M & S store. Very busy, especially the run up to Xmas and I was concerned because I have arthritis.
IT GOT ME OUT OF THE HOUSE AND I MET SO MANY PEOPLE. My arthritis was ten times better with the exercise.
Can you perhaps find something locally. Not a career, just a little job where you can meet people and talk about other things than the home.

I do hope things will take a turn for the better.

Do let us know.