How does ponyboy react to what sodapop tells him about darry in the outsiders?

Sodapop tells Ponyboy how tough it is for Darry to look after them, and that although Darry always seems to be on his case, he really loves Ponyboy a lot. Ponyboy reacts with a sarcastic response; deep down inside he hears what Soda is saying, but he doesn't quite understand it right now.