It is never made clear whether or not Katara develops a crush for Zuko, but at the end of the series, we are certain that she and Aang are together.
Zuko never kisses Katara.
Only as a friend, the thing that Zuko and Katara are in love is total fanfiction, Zuko loves Mai and Katara loves Aang.
no zuko and katara never go out zuko ends up with mai and katara ends up with aang
Mai and zuko because katara is already taken by sang
zuko
Aang would be extremely hurt, because he trusts Zuko and Katara, and he and Katara are kind of dating.
She doesn't!
Apparently Not!
zuko is lord's of fire son and katara is the last waterbending SOUTH tribe of water and Sokas litle sister
Zuko does not like Katara in that way, they may be friends but their not together. Zuko will forever be with Mai and Katara with Aang. - Zuko likes (read: AS A FRIEND) Katara because he respects her strength of character and ability to waterbend. They also share the connection of Having lost their mothers, something that is normally hard for them to talk about.
Zutara (Zuko X Katara) is a fanon pairing, meaning it does not occur in the series. So, no. Katara and Aang eventually get married and have a son, Tenzin.
Zuko and Katara will never kiss, they don't even like each other like that.