Board Thread:Naruto Discussions/@comment-27829630-20151230182110/@comment-1018594-20151230182757

Toneri wanted to marry Hinata to obtain the Tenseigan, and then he got jealous when he realized she loved Naruto after she "agreed" to marry him. I'm guessing he got over her after that.

He also never said the moon would never approach the Earth again, he said he wouldn't, meaning he'd remain on the moon in isolation.