Bored to death.
It's the best way I've found to describe my bouts with depression. "BORED TO DEATH!"
I've also used "everything and nothing." There's no feeling, nothing. Feels like if you could personify 'dark grey'.
I'd do anything to not be in this state.
I have.
Cause trouble, look for it, just so I could feel.
I usually just wait it out.