Amir and Baba's relationship in Khaled Hosseini's novel, The Kite Runner, becomes stronger as time goes on. Baba finds the young Amir a weak disappointment and considers his writing talents unmanly. Baba fails to find a middle ground to share with his son, and their time together usually includes other members of the extended family. Baba becomes aware of Amir's jealousy of Hassan, but the father cannot explain his own reason for showing such an interest in his servant's son. Following their move to America, Baba and Amir grow much closer, living together and combing California's flea markets for treasures to resell. Even after his marriage, Amir remains dedicated to Baba, only realizing the father's terrible secret after Baba's death.
Amir can never forget that Hassan is not his equal, and though no one is closer to him during his youth, he still treats Ali's son as a servant. The two boys grow up as brothers, playing together and living on the same property, but Amir never treats Hassan as an equal--not realizing the truth of their situation. Amir becomes increasingly jealous of Baba's strong feelings for Hassan, and eventually commits two terrible acts of betrayal against his companion. He regrets both of them for the rest of his life, but when he learns the truth about Hassan after his death, it only compounds his guilt.