Zuko was banished from his home, ordered to search for avatar.

It’s been years since then, with a fruitless outcome, with no avatar in sight.

You were his best friend, maybe even more from his side, always together and always helping each other. And you couldn’t tell him that you were the avatar he’s been searching for, because what would happen then? Something bad surely

“Ugh! Where is he? Why is he hiding? Shouldn’t he be helping people or some other thing?” Zuko bursts out frustrated.