Fiction where main characters have depression? Or it is integral to the plot?

Hmm...

1) It's Kind of a Funny Story, Ned Vizzini (later turned into an indie movie that captures the psych ward experience too)
2) The Silver Linings Playbook, Matthew Quick (also a movie)
3) Forgive me, Leonard Peacock, Matthew Quick
4) Too Bright to See too Loud to Hear, Julian Garey