He didn't see her again, not in the school nor on the train. He didn't want that to disappoint him so much.
His mother may have noticed something different in his demeanor, but if she did, she tactfully didn't bring it up. She was busying herself organizing the Malfoy's annual Christmas ball, which had been cancelled the year prior for obvious reasons. She was attempting to create a guest list that, while still being exclusive, would contain all the proper sorts of people so that it would be seen a celebratory union of the two spheres of the Wizarding world. Lucius had nothing but contempt for the Wizarding world now, and though he had evaded Azkaben, he secluded himself in a luxurious townhouse overseas, effectively abandoning Narcissa. Draco felt the way the house had changed without him there, becoming something less intimidating, less representative of the fear that he had grown up surrounded by. Narcissa was easily distracted and frequently flustered now, though she lavished her son with conventional attention she felt guilty about not supplying during his childhood.
His home felt almost comfortable, but it was undeniable that there were horrible memories that had pervaded the very floorboards of the estate. He knew that Narcissa had had the dungeons completely remodeled and now they were full of bright colors and lovely carpet, but even that couldn't cover up the atrocities that had taken place. And the two of them had abandoned the formal dining room for the large table in the kitchen, because the other was too painfully reminiscent of their choices.
And he hated it. He hated feeling like this everywhere he was—shameful, and unbearably guilty. He knew it wasn't his fault, he had been bred and raised for the specific purpose of carrying Lucius' name and everything that it entailed, but he felt so conflicted. How much of it was his fault alone?
Besides, though his father had never been kind, nor loving, he still felt a deep hurt when his father left them. He had always thought that he, as Lucius' prized son, was more important than Voldemort, or the pureblood cause. But apparently that was not the case.