The text is about a conversation about Marta and Juan. Juan is happy because he is returning to Puerto Rico and he is going to see Marta. He also knows that Marta is sad because they will have to be separated during the whole semester but he is sure about something.
-When he says "yo estoy feliz" he's saying he is happy.
- When he says "Tú estás triste" he's saying that she is sad.
