Why does Pony Boy think that Dally could never love anyone or anything?

Ponyboy believes that Dally could never love anyone or anything because of the harsh experiences and trauma Dally has faced throughout his life. He sees Dally as someone who has been hardened by violence and loss, leading him to build emotional walls and avoid deep connections. This perception reflects Ponyboy's understanding of Dally's troubled past and the way it has shaped his personality, making it difficult for him to show vulnerability or affection.