why does jonas go back to The Giver?

Jonas no longer wants the memories, but he returns every day to the Annex knowing that others are free to live without anguish because he bears their burdens. After sharing memories of war, the Giver gives Jonas a number of happy memories so that he knows the joys of individuality and of art. He also remembers riding a horse and the bonds between animals and humans, and he learns the joys as well as the pain of solitude. He asks The Giver for his favorite memory, which the old man gladly gives him.