Already Gone: A Depressing Fanfiction

She knew it was her fault he died. She should have stopped him. Done something.
But his death sparked something in her that she didn't know she had. Her already addled psychological state has already been pushed so far, but has she broken yet? Or will she hold?
She snaps after his death. Broken. Reveling in insanity; the only closure her shattered mind has, her lifeline. Her only lifeline.
But if he comes back.
What happens when he finds out?

All she knows now is insanity, a world of blackness and hallucinations, silence and voices.

Better than summary whoops. Rated because I'm paranoid.

Depressed!Artemis Dead!Wally