We have this idea that we are supposed to be blissfully in love and happy as songbirds stuck in our heads from movies, books, tv shows, etc.
I’m not a pretty pretty princess and my husband certainly isn’t a prince. We’re real people with real lives and real problems. If I clung to the idea that we were supposed to be married and live happily ever after otherwise we must be married to the wrong person I’d have divorced years ago.

We’re happy sometimes, sad sometimes, depressed sometimes, estatic sometimes and merely content as much as possible.
NO ONE is happy all of the time. No one. If the OP’s DH is looking for Disney happiness he’s never going to get it!
If Bernadettefaith is trying to remind her husband of happy times, try scent. Scent is a very powerful memory trigger. Back when my DH and I were having problems I remembered that I used to use this certain body spray. I guess I got bored and stopped using it somewhere along the way, but I used it all the time when we were going through the blissful stage. So, I bought some of the old body spray and started wearing it again. It actually helped. The scent was associated with feeling all in love and very attracted to each other and those are the emotions wearing it again evoked.