Zuko met you when he and his uncle opened the tea shop. It started with a friendship and, well, ended with Zuko now sneaking out at night to meet you where no one could see you two.

He didn't tell you about his real identity and he dreaded the thought. What if you report them to the Fire Nation? What if you hate him?

No, the fact that you knew his name, was enough already to put him and his uncle in great danger. For now, Zuko will just try to enjoy this simple life for as long as possible.