...Are you kidding? You've gotta be kidding. Zuko's just as stubborn as Katara!

"Yes, I did! You're nothing like those guys! I mean, you were once, yeah, but now you're totally awesome! I mean, really, even then, you were so dedicated! I mean, for months, you chased after us! Months! But, what I mean to say is, I'm glad you're on our side. And I really mean it! I really believe you've changed!"

While he's talking, he wraps an arm around Zuko's shoulders for emphasis. The event is making him so affectionate.