Ahsoka's fate hasn't been confirmed yet, so we don't know.
Ahsoka
Yes
No, Ahsoka doesn't have any sentimental relationships in Star Wars: The Clone Wars
No. But, they have a strong realationship!
Dave Filoni; the director on Star Wars the Clone Wars
No
Ahsoka Tano served as Skywalker's Padawan during the Clone Wars.
The name of his apprentice is Ahsoka Tano
That episode is Season 3 Episode 16 "Altar of Mortis." (And actually, the only reason why Ahsoka turned evil was due to the living embodiment of the dark side of the Force corrupting her with a spell in an attempt to get Anakin to join the dark side)
If you mean Ahsoka Tano, then she is the Padawan apprentice to Anakin Skywalker in Star Wars: The Clone Wars animated movie and following animated series.
Ahsoka Tano returns in season six, but only for a moment as a vision from Yoda.
Yes. She's in the novel of the pilot film, "The Jedi Path" as a commentator, "The Clone Wars: Wild Space," "The Clone Wars: No Prisoners," "Clone Wars Gambit: Stealth," and "Clone Wars Gambit: Siege"