What thoughts and questions did ponyboy have after seeing the picture of Bob in the yearbook?

After seeing the picture of Bob in the yearbook, Ponyboy felt a mix of emotions, including sadness and confusion. He reflected on the complexities of their lives and the tragic circumstances that led to Bob's death. Ponyboy questioned the nature of their rivalry and pondered how different things might have been if they had understood each other better. This moment deepened his sense of loss and highlighted the senselessness of their conflicts.