Emotional Departure

During the scene where Ali and Hassan were leaving, I was slightly confused. I could not understand what Amir was doing while he was putting the watch and money under Hassan's mattress. At first I thought that Amir was running away and wanted Hassan to have these things as a goodbye present. Also, with Amir saying that, " one of them would have to go," never did I think that Amir would try and set Hassan up for theft. As this scene progresses and they are all together discussing the matter, I was shocked that Hassan lied and said that he had stolen the money and watch. This was very upsetting to me because Hassan and Amir had been really close and Hassan did so much for Amir. What was most shocking was Baba forgiving them. I really could not understand this, since the one thing Baba hated was thieves. I realized during this point in the book just how much history there was between Ali and Baba. You could see how much it pained both Ali and Baba to depart, but it hurt Baba the most. I did not comprehend  why it pained Baba so, but it all made since later on when we learned Amir and Hassen were step-brothers. Throughout this whole scene, I was surprised about how loyal and composed Hassan remained. Hassan could have betrayed Amir or addressed him about Assef and his friends, ask why he did not stop them.  Somehow though I think Amir knew  that Hassan would not betray him, because they were so close. Ali and Hassan leaving was a big event in The Kite Runner. I was disappointed to see Amir and Hassan's relationship break apart the way it did, and throughout the story, I was hoping for them to reunite and make up.