I'm trying to hunt down a story set in S5. It starts off with Sam admitting himself to a Psych ward wanting to be treated for the demon blood addiction. Although of course he says that it is an alcohol addiction. Little does he know that the ward is run by Lucifer's minions and they secretly give him more demon blood. The story has Lucifer as Sam's doctor and he tries to get Sam to say 'yes'.

It also takes place when Sam is separated from Dean i.e. post 5x02. Bobby contacts Dean about Sam (he's worried about him) and Dean hunts down where Sam is and goes there. I think that there is a scene between Dean and Sam!Lucifer about Sam.

Last thing- I'm positive that I read it on Fanfiction.net but I can't remember the title or the author's name. Does it sound familiar to anyone?

Thanks!

ETA: FOUND by jenilees. It is Hello, My Name Is Sam by everfaithful