Drarry- You Have To Be Careful
Draco Malfoy was breaking apart. The people around him were tearing him to pieces and not bothering to help him put them together again.
So Draco fled. He ran away from the things that were braking him and went somewhere no one could find him, somewhere that was safe.
And now Harry, who's on the run from a psychotic werewolf, needs somewhere like that. Somewhere no one can follow him, somewhere he can relax from finding Horcruxes and whatnot.
And Draco's place is the perfect place. And while he's there, maybe he can fix Draco?