When they meet, the fox explains to the little prince that to tame means to create bonds, to need one another. It is then, that the child understands that the flower has tamed him. And it is this need for his rose that makes him want to return to her, to his asteroid.
“(…) But if you tame me, then we shall need each other. To me, you will be unique in all the world. To you, I shall be unique in all the world..."
"I am beginning to understand," said the little prince. "There is a flower... I think that she has tamed me...”