Avatar: The Last Airbender, Season 3

Aang:
So... this is it, huh?

Sokka:
Are you ready for the Fire Nation to know that the Avatar's alive?

Aang:
...I'm ready.

[Team Avatar has a group-hug]

Hakoda:
Everyone, listen up! The next time we re-surface, it'll be on the beaches... so stay alert, and fight smart! Now, break time's over! Back in the subs!

[Toph and Sokka re-enter the sub, leaving Katara and Aang alone, awkwardly]

Anng:
...Katara, I-

Katara:
I-

[They both pauses, flustered]

Aang:
... You go first.

Katara:
We've been through so many things together, and I've seen you grow up so much. You're not that little goofy kid I found in the iceberg anymore. I guess, what I'm trying to say is... I'm really proud of you.

Aang:
... Everything is gonna be different after today, isn't it?

Katara:
Yes, it is.

Aang:
What if... what if I don't come back?

Katara:
Aang, don't say that. Of course you'll-

[Aang cuts her off by leaning forward and kissing her; after a pause, she leans in]