I have read this with a growing sadness. "It takes two", "give and take", "live and let live" and dare I mention "for better or worse" spring to mind.
So you find sci-fi mindless, why sit in the same room mindlessly trawling FB or GN? Go out. Find an interest. Meet people. Read a book.
He likes sci-if, you don't.
He likes football, you don't
You like Bake-off. He doesn't
Isn't that how mature relationships develop? When you are young and joined at the hip a girl may follow her boyfriend to boring rugby matches, pretend to like his music and share his passions. But you are a mature individual and while it is great to share interests or hobbies, it is hardly a deal breaker to establish your own
We have had a few threads in the past where an OP complains how boring her DH has become especially now he is retired and"cluttering the place up" and within a few pages she is exhorted to "go girl" "you are entitled to happiness" and apparently gives up on the marriage after however many decades and strikes out alone. How she copes with the practicalities, the finances, the loneliness, how the children and grandchildren are affected we never know. Nor how her possibly devastated ex-partner copes with having his world turned upside down
But there is a huge difference between leaving an abusive relationship (and I take my hat off to those of you who have survived and built a new life for your children and yourselves) or leaving a lying and cheating partner , and just being bored. What is it we used to say to our children when they moaned "I'm bored"? I leave you to remember what you used to tell them.
The grass is not always greener.
Last chance at life?