At the beginning of Chapter six, why does Pip feel bad?

Joe, Pip, and Mr. Wopsle walk back home. Pop decides not to tell Joe the truth about his file and the pork pie -- he is afraid of losing his respect. Pip's fear that Joe would "think worse of me than I was" if Pip told him about the file and pork pie is a fear that Pip will revisit throughout his young life. Joe is the only friend in the world for Pip, he is his entire society. Pip fears to lose this companionship by telling the truth. In the future, Pip will struggle with telling the truth because of the fear that society will think less of him.