It isn't actually golf in my case but an equally absorbing hobby which I don't share and which takes him away every Sunday.
I've put this on the relationships forum because it is definitely affecting ours.
How do you cope?
It's been a gradual and slow process from occasionally having to book him for family meet ups and other Sunday activities, when he would be apologetic, to the stage now when none of the family come on Sundays because he's away. which leaves me in a slightly desperate place.
Should I give up on weekends completely and find myself a Sunday activity so we just go our own ways?. I feel lonely and cross, partly because there's that expectation that as I'm at home, I'll do cooking, gardening and every other darned thing which needs doing.
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). I had to think of cheap and creative ways to feed them all. The resentment would build up until I would explode and he would accuse ME of being selfish! 
I know my late m-i-law was definitely a golfing widow, she'd tell anyone and everyone frequently. She definitely had a case, he neglected her in that respect he had a business that kept him busy six days a week, as did my husband before he retired, but he was happier to delegate, the weekends were ours, unlike late f-in-law, who on the 7th day, Sunday, played golf all day, he also never took her on holiday, but would go away with his golfing cronies. His get out of jail card was throwing a lot of money at her, so materially she had everything, but alas not companionship, it wasn't the marriage she wanted, so I do sympathise Grammetto. She died first and it was only towards the end of his life he admitted he should have been a better husband.
I understand no more about golf now than I did when we first got together over 35 years ago.