I've been wondering the same thing, except, its going on 3yrs now. I used to always be doing something. Now the highlight of my day is going to get my mail, and talking in the forums or chat rooms. I don't even read books that I've been given to read.
I live alone since my divorce and like it that way, I know its unhealthy, but...here I am. "Flat" is a good word for it...hopefully someone can shed some light on it.

Greg