How does Amir’s betrayal of Hassan can be seen as a lesson about power in relationships?

Amir feels so neglected by Baba that his longing for Baba's love and respect lead him to betray Hassan not once, but twice. Amir's victory brings him closer to Baba than ever before, a fact that Hassan's rape would have overshadowed; because of this, Amir does not stand up for Hassan or tell anyone about the rape. Later on, when his guilt becomes unbearable, Amir prefers to drive Hassan and Ali out of the house rather than admit to what happened and risk losing Baba's affection, and he can.... simply because his words, over Hassan's, will be accepted. The kite fighting incident underscores the sense in the novel that every action has a consequence or a price. In exchange for his newfound closeness with Baba, Amir must give up his closeness with Hassan.