A/N: I've had this idea floating about in my brain for a while, but it's been a long time coming to paper. This is not a form of writing that I'm that familiar with as well as my first dive into the Avatar world, so please bear with me. I'm choosing to look at this both as a character study and a writing exercise. I think it's most likely to take place after the series, but possibly during the finale episodes.
Yours forever, Tsona
You think I don't know because I can't see. Maybe I can't really see that your eyes are bigger than usual or that your mouth is pulled down in a frown, but I can hear fine. I can hear better than you and I can hear your sighs. I can sense you standing by the window looking up at her. I heard what they said in that play. You kissed the moon spirit. I think you loved her. I think you still love her.
I don't know if Suki notices, but I do. You keep away from her more at the full moon. You keep away from all of us more at the full moon, but especially her.
Usually you two are hanging all over each other, but you grow colder toward her at the full moon. You snap more quickly. Which is saying something for you, really. You draw away, first emotionally, then phsyically. You slip off into the shadows. The others don't notice, but I can feel you leaving through my feet. You slink off to stare at her.
She can't be with you, Sokka. You can't marry the moon. It's time to let her go. And look for love on earth.