This is the first time I've found how I'm feeling so well described by another person. I understand where you're coming from.
Great work.

This is a whole mood.

It's so strange to realize that you never do things you used to enjoy. I think maybe the best thing to do is just pick a time to try them out again; make time to see if you can still find joy in the things you like to do. And if not, well. Sleep helps. Finding people to talk to helps.
In the end I suppose it is what it is, eh?