Draco tried to stay in his room until Aunt Bellatrix called him very forcefully down into the sitting room. He averted his gaze from Potter, Granger, and Weasley, until his father pulled Potter toward him excitedly.
"Draco! Come see! Is this Potter, son? Is this Potter?"
Draco stared determinedly at the wall. It was so dark, except for the roaring fire, that he doubted anyone could properly see his face, much less see the pink tinge crawling up his neck, though he did worry. He wondered if that was quite rude, seeing as three of his former schoolmates were probably about to be nearly killed.
"Draco, don't you understand, if it really is Potter, the Mudblood, and the blood traitor, we will be rewarded! Everything will be forgotten and forgiven!" Lucius cried gleefully and desperately.
Lucius spun Draco around to face Potter, but Draco pulled away quickly.
"Maybe. It could be," Draco said.
He turned toward the wall again.
"I shall call the Dark Lord now!" Lucius said, pulling back the sleeve of his robe. Draco's eyes widened, but he kept his gaze toward the stone wall. He now was afraid, afraid that the Dark Lord would kill him, or that he would be able to see thestrals more clearly now.
"No!" Aunt Bellatrix jumped up and pointed her wand toward Lucius. "I shall call him!"
Draco retreated into his room, locked the door, and sat down on his bed. An hour later, he heard it. The Avada Kedavra. The spell, the curse, that would kill. Draco squeezed his eyes shut. Now it was impossible. Everything he had ever dreamed of. It was all gone, his dreams.
"No!" Aunt Bella cried suddenly. Draco jumped, fell out of his bed, and drew his wand. Had the Dark Lord finally come? But then why had Bellatrix screamed? Was it possible that...?
Now the only thing both he and Potter had to do was stay alive until the Dark Lord died.

-------------------------------------------------------------------------------
So this was bad, but I had other stuff to do, sorry.