The Kite Runner Part 2

I thought that it was interesting how Baba had given Hassan the opportunity to get rid of his cleft lip. Also, when Amir and Hassan were getting bullied by the older kid, Amir thought that Hassan was just a servant and not a friend but he then changed his mind. They had spent almost their entire lives together, they hang out and play games everyday together, I am not sure why Amir wouldn't even consider themselves friends.