You betrayed The Avatar and his friends because you never wanted to be chased by fire benders because you were 'friends' with them. But you couldn't feel anything for them. Not even a sense of pity for Zuko when a revealed hiw he got the burn on his left eye and how he was banished. You didn't feel a sense of pity for Katara and Sokka when they said how they're father was taken as a prisoner for the Fire Nation. You didn't feel pity for Aang when he found out Roku was killed and dead. You felt nobody for anybody. You left at midnight because everyone was asleep. You never cared for anyone there so why should stay? As if they needed you for whatever adventures the drag you along in. You finally had enough and had the courage to abandon everyone and just leave without telling anyone. Because you trusted no one and never cared for them. You knew you could take care of youself because your tribe wound touch the weak and young how to hunt on their own and how to survive on they're own.
After a few days you were hunting on your own, until you were splashed with a harsh way of water, and you fell off the tree you were on top of. But when you turned to make out who it was, it was Katata who splashed you with the water, and the others who were behind her were Aang, Sokka, Zuko, and Toph. When everyone made eye contact with you, they're eyes widened. But the first one to speak was Katara.
"Where the heck have you been?! We been looking for you!"
Kataras tone was full of disappointment and some anger inside of it but also a tingle of relief to see you alive, healthy, alright.