"No, it's not optional," Draco argues. "You are my friend, Potter, and I'm no abandoning you to deal with those yourself. How could I move out of here and pretend like I didn't know that was going on here?"

And that for him is a huge part of it. He couldn't know what he does now and just walk away. It wouldn't help either of them.

"I mean it. I'm here to be there with you, to help if I can."