That happens! I think it's about time u try changing genre. I used to go ga-ga on shoujo then shifted to action, then found myself fawning bout the 2 male chara. Then suddenly Im into bl. And then if I got bored I just rotate back to shoujo again.
It's also good if u challenge urself to read something u think u can't handle like super dark/psychological or straight up horror. The new perspective sometimes is more interesting when u think it's predictable but not.
It's not an advice per se but just me sharing the things that happened to me. Hope you found something interesting again!

Lately everything i read feels boring and plain. Like I rlly wanna like the things I’m reading, the art is great, the story is cute.. it’s just so uneventful and boring and I hate it! Not rlly asking for advice just wanna know if I’m the only one.