I've been looking for this story for months. I have no idea what it's called, but I think it's only in two parts. Dramione has been secretly dating for awhile and it's revealed after the golden trio is searching for all the horcruxes. Draco is still at hogwarts and stays in the room of requirement and helps with healing. There's a pretty epic smut scene when they're reunited. There might be a dance or ball at the beginning that he corners her when they're alone in the hallway or something? Help!