I'm in the exact boat as you. The burnout set in so slowly that I didn't realized I was burned out until I stopped working and had the time to look at my life.
That’s what happened to me with my second burnout. The first one hit me like a brick. I’m glad the second one isn’t as bad as the first one mentally. I regret not taking enough rest during my first burnout as I never fully recovered, this time I’m taking things more seriously.