You were sitting in a nearby shore while everyone is asleep.. you're trying to cool your head off since you may or may not get jealous whenever Zuko and Katara are close which is everytime..you started to rant about how you want to be like Katara so that Zuko will notice your love for him. Zuko couldn't sleep so he decided to go to the shore, but instead he saw you slightly crying while screaming a bit