First of all, I have enjoyed the 4 Posts you have written!!!
However, I believe you are being too hard on yourself. It's funny, in some ways my life mirrors yours. My wife attends about 25% of the Meetings, I about 75%. Anytime I share my research with her , she gets upsets and makes an extra effort to go to the meetings.
So what I am trying to say is, don't mention your findings to him. From what I remember, he used to miss a lot of Meetings until you started sharing things with him. If you leave him alone , he will probably slide back to little activity.
My best time with my wife is that every evening we have a mix drink(trying out many new ones), Go for a walk or work in the garden together, then switch to a glass of Red Wine, try out a new dinner meal she has found and then watch a TV Program or Movie, go to Bed and do it all over again the next day!
No arguments, no fussing, everything on the upside. Also, we have a Camper and go out 4 different weeks (5 days each) during the Summer months and don't go to any Meetings while we are on Vacation. No ruff camping either, I even bring my Satellite TV Receiver with me!