I just posted a similar answer to what I'm about to say on another thread. But I feel you. I've given up on things that I enjoyed doing for years. I didn't know why until recently I decided to enter therapy. Unfortunately I haven't replaced them with things like you have. So sometimes I literally just sit and stare at the wall or watch my dog chew her bone. It's fine spending time with my dog, but not just watching her, would be better if I'd take her in the yard and play with her or go for a walk or something.