You guys are probably gonna hate me because I don't remember much.
Draco came into his creature inheritance (maybe veela?) and his mate was Harry. Draco's father was very close to Draco. Draco and Harry were given their own room, but I don't think Harry was happy. He tried to kill himself, he sliced his wrists in the bathroom, and Draco freaked out. Lucius was trying to beat down the door to get into the rooms,
I know it's not much, all of that was basically just one scene from the story that I remember. It is either on AFF or FF. If it is on another site, I'm not aware of it. Hope someone knows of this story, I've been searching for a long time.