"I didn't choose the memories, Draco," Harry couldn't help but bite back. So little of what had happened today had been intentional. Still, that was hardly the reason Harry felt so defensive; he could see, could feel the difference in Draco. He wasn't right. It made him wonder how many walls separated him from the world outside. Did Alyssa even know her own father? But then... it was probably for the best this way anyway, wasn't it? Maybe Harry's own relationships could only be helped by his hiding himself behind walls.
Harry rose and walked over to the door. "I'll work on it." He checked that he still had his wand. "I'll see myself out. ...And thank you."