Hermione realised the truth of his words. And he was right, there were various instances throughout her life. Maybe she had never been the pure and righteous person she thought she had been. Maybe she had always justified her dark actions as for the greater good when it was actually simply for her own twisted pleasure and revenge. Maybe that was the real reason she always came to Malfoy... Someone like her. Someone selfish. Someone who wanted things their own way. She never compromised with Ron, it was her plan alone and he had to fall in line with it. She never had any intention of compromising. Not really. 