Jealousy displayed in the book; that was then, this is now

Bryon feels that Cathy understands him, and he spends more and more time with Cathy. Cathy is honest, innocent, and has dreams of going to college. Mark begins acting weird, and even jealous of Cathy, with Bryon; he often stares at Bryon trying to figure him out. Angela Shepard gets married to a friend of her brother’s. Bryon believes that he himself is changing, while Mark is not.