Nope I've never fallen out of love with Ayu, or anyone else for that matter. I've only recently felt disappointment for an artist and lost interest in their releases and that's for Koda Kumi
But to be honest, even though I listen to Ayu a lot, I don't listen to her nearly as much as some other people I do. There are people who have listened to songs like Days or Sparkle hundreds of times and I don't even know how they can do that. I listen to such a large spectrum of music daily, I may come across Ayu 10 or so times out of 100 listens. I only listen to her a lot when she comes out with a new album (I've been listening to NEXT LEVEL+TITO+BOA non-stop for the month of April lol). So maybe a break or a larger spectrum of music will help?