whar does tom think of what he's done to becky

Are you asking about the engagement? Tom's blunder in accidently revealing that his engagement to Becky wasn't his first makes her cry. Tom is in 'love,' but much to immature to handle tears so he simply walks away. He feels terrible, spends some time in the forest getting his thoughts together, and in his mild depression (I hate to use that word; let's go with he feels guilty) decides to become a pirate.