I'm sorry you're having a rough go of it with your love of cycling. I can relate. I think it happens to most people. You may still love it, but you just are sick of it. Sometimes you need to look at your bike and say "let's take a break." With some time away and doing other things, you'll come back to love riding again. I think we sometimes just need new things to give us a challenge/boost, and then we can return to the things that we found mundane and unexciting.
You're still commuting, tho, and I think that's a great way to still ride and find joy. Do you think in your subconscious that commuting has turned your cycling into a chore? Just a thought (it did for me when I did it more often last year).