How are amir and soraya similar? Different? Why doesn't amir care about her past?

They both are kind people and have a complicated past. Of course Soraya is a girl so that automatically puts her into a very different position in Islamic society. Soraya was more of a rebel than Amir in her past. She had ran away and lived with a boyfriend. Amir doesn't care about the past because his past wasn't so great either. He sees parts of Hassan in her personality, and her birthmark. Soraya is really the best thing that has happened to Amir in a very long time.