To be fair there are a lot of very unhappy coupled folks out there as well stuck with essentially the opposite problem: the attraction has left the building and hasn't been there for a very long time and waiting for it to come back is likely an exercise in futility. See r/deadbedrooms etc.
Well, rereading what I wrote I was maybe not so clear on that.
If you are just waiting for the attraction to come back, chances are that it doesn't, even though it certainly could. It all depends on the reason that attraction disappears. Sometimes it's related to the things you do and sometimes it isn't. The key, I believe, is to always try to be a better spouse than you were a year ago, or even a month ago. But that of course presupposes that there exist mutual trust and respect between you. It won't work if only one part is trying to be a better self for the other.
