It was a fic were Blaine and Kurt were in college (I think in New York).
Blaine got really depressed and started self harming.
He also wasn't doing his homework anymore and he started smoking.
He didn't want Kurt to find out about the selfharming so they didn'T have sex.
Then one night he decided to kill himself and he wrote a letter to Kurt but then he didn't do it and he forgot about the letter.
In the last chapter I've read Blaine had been cutting his wrist when Kurt came home so he put on a shirt so Kurt wouldn't see but he bled through it and Kurt found out.
One other scene I remember is that Kurt went out to get coffee so Blaine went outside to smoke, but since the coffeeshop was closed Kurt came back early and saw Blaine smoking and he thought the smoking was why Blaine was acting so strange