I was fortunate enought to retire some years ago, and the reset in our relationship was something we discussed before and since me leaving work. It's a massive change of life that many, including me, underestimate.
My reaction was to pick up everything around the house, chores, learn to cook (that I found I love and do pretty much it all now) so my wife can kick back when she comes home. I was 30 years full time on three shifts, so our family life revolved around that. She's still working on reduced days, enjoys her work and colleagues but is getting ready for her quitting in two years or so.
I also got more involved in hobbies I'd dropped due to working and ridiculous hours and did voluntary work and now run my own small business.
It's really not your job to 'cater for his every whim'. Frankly, he needs to get a grip and take some responsibility for his part in this really important change of life.
We're in a good balance now, but it took some time to find it, if you get my drift?
Can you talk to him about how you feel around it all? I work with other retirees and have studied what it really is to prepare business presentations around it.
It can be a hard process to work through, and I can assure you, not that it's any consolation, that you aren't alone in how you feel about it.
I wish you well, and thanks for sharing this one.