I don't want to do anything but crash out on the sofa and stare at the ceiling. Getting the enthusiasm to move is hard.

It's time to schedule an appointment with a good mental-health counselor. Intellectually, you know there's plenty of health mood range between don't-want-to-get-up-off-the-couch and perky-happy. Most of it is closer to the perky-happy end, but if you're spending a lot of non-work time on a couch, you're in a serious funk or you're a football addict. Either requires appropriate treatment.

Maybe you'll be able to "push past this," but there is no crime to asking for a professional judgment and some advice.