What can be inferred about JB’s personality from the conversation between Josh and Miss Sweet Tea in the poem “Phone Conversation (I Sub for JB)”?

He does not trust his brother.
He does not care about girls.
He is nervous about talking to girls.
He is overconfident.

Based on the conversation between Josh and Miss Sweet Tea in the poem "Phone Conversation (I Sub for JB)", it can be inferred that JB is overconfident.