So true, not caring, no joy- anhedonia. I also know what you are talking about.

I was irritated with small talk even before the depression. As an introvert, that does not mind being alone this was not really big change.

Even though the depression makes 'small talk' harder to take, the larger challenge was not paying bills, buying groceries and not caring that I did not care.

Glad my mood has improved slightly- now I care, but then the anxiety takes over of the consequences of not paying bills, and so my energy has not improved, even less time for small talk.

I try to be polite, and that is enough, and i do the same as justfloating, look for a timely exit. I also am sustained by a few close friends, and a great doc's and T. ok meds...

...and reading post like yours, I do not feel alone.
G1