I'm a different sort of animal. I have a range of interests and hobbies, and I'm active in them one way or another. I volunteer (shop for shut-ins at our grocery store that has a service for those clients. They phone in their order to volunteers, those get passed to we-the-shoppers, and we shop and check it out. They pay at the door a few hours later when it's delivered. I'm on the local board of Crime Stoppers as well.) I sing in a choral society, have several telescopes and do amateur astronomy, have a substantial garden, and go for fitness-effort walks when I don't feel tied to the house for my wife's sake. What I mean is, I am on the computer a lot, reading, listening, watching, learning. I learn all I can about my conditions, my wife's conditions, and so on....lots to keep my mind occupied. I'm also naturally contented, happy, as people seem to notice about me. I don't get despondent or rue my misfortunes. I feel that is too close to 'giving-in' for my liking. I wanna be in charge, in control, on top of things, and that necessarily means a busy mind, always doing something, always thinking...
Thanks for your good wishes.
As long as you have the energy and the Good Will to work on behalf of others, that's about the best prescription for happiness that I know.