well, i had the same thing happen to me, and just for no reason i am suddenly obsessed with it
I guess it was becuase i sorta had a revelation type thing. I was looking through the coraline algea all over the front glass so thick tou could barely see through it and i hadnt done a water change in a few months and i was looking at my clownfish thinking, i bought this to enjoy it and im not because i can barely see through it. So i thought deeply about getting rid of it and one day i thought how would i feel if i was in there, so i grabbed a razor and scrapped away for hours at the algea, when i was done i saw that i had horribly sick corals like zoas and shrooms so that was next. I saved the shrooms but i was too late for the zoas. Next i noticed i had a horrible aiptasia problem so i took half of my LR, put it in hot water and killed the rock wich caused an ammonia spike which killed my two day old royal gramma but after many water changes fixed that and now my aiptasia is under control. For some reason after all of that i havnt lost interest, if anything ive gained interest and im makeing weeky trips to the LFS.
My advise would be give it time and youll gain interest in it one way or another. Maybe try rearanging stuff, getting something new, something to help you get out of that rut your in.