He knew the boy would never understand what had happened with Snape and him, but he didn't have to be that prattish over it. He was his best mate. He was supposed to be supportive, wasn't he? So why was he being a snob about it? Just because he was getting better at potions? Harry knew that Snape had been a jerk all through their early school years, but now that Harry knew why, he couldn't fault the man. Besides, he had saved all their lives more than enough times to make up for it all.