Hello Mary, before men retire they always believe that eventually, they will have time to do what they've always wanted to do, whether this is an interest they have or something new that's suddenly inspired them to do, but when retirement does happen, it's quite a shock to realise that they don't have any work commitments and may become feeling like their struggling with their mood.
My retirement was caused by how I was feeling, becoming depressed years ago, but I was too young and wanted to do so much more in hindsight, now I'm physically incapable and unable to, only passing on ways for other people, but my son has taken over and knows what to do, while the other son has learned so much.
Even though your husband is in good health, physically, doesn't mean that he's not feeling well mentally, although at 64 who is going to come out and say they're depressed, sometimes it doesn't occur to them they may need help, however, going to the movies is good, but perhaps all he wants to do is 'go with the flow' and doesn't or can't make decisions on his own, only do what he's told to do, I'm not sure Mary.
One way to help him is to ask whether or not he is interested in contacting the Men's Shed, people his age who get together and talk about anything that interests them and some of the men at bowls may also be going.
Mary, I know this must be lonely for you but both your children and grandkids must be a joy for you to entertain.
Hope to hear back from you.