How can I describe Amir's internal conflict with the guilt from Hassan, and how was this conflict resolved in The Kite Runner?I'm having trouble...

Amir suffers feelings of guilt from two specific acts that
involved Hassan. First, Amir fails to come to Hassan's aid when he is raped by Assef
following Amir's victory in the kite-flying tournament. Although it would have been a
courageous act to intervene, Amir chooses the cowardly way out and simply hides,
remaining silent as he watches the future Taliban tyrant sodomize his friend. Then, on
Amir's birthday, he plants money under Hassan's mattress to make him appear guilty of
theft because he is jealous of Baba's attention toward Hassan. Although Baba forgives
Hassan, his father, Ali, decides they must leave Baba's home. These two events haunt
Amir for many years, and he eventually discovers that there is only one way to atone for
his sins: When he discovers that Hassan's son, Sohrab--who is actually Amir's nephew--is
still alive in Afghanistan, Amir decides that he must find him and free him from the
hands of the Taliban. It is a dangerous mission, verging on suicidal, but Amir knows
this is the only way his conscience can be cleansed.