why does Pip love Joe? What reason does he give for keeping the truth of his crimes from joe?

Joe, Pip, and Mr. Wopsle walk back home. Pip decides not to tell Joe the truth about his file and the pork pie -- he is afraid of losing his respect. When they return, the topic of discussion is the question of how the convict managed to get into the locked house. Through his bombastic overbearance, Mr. Pumblechook's argument wins: the convict crawled down the chimney. Mrs. Joe sends Pip to bed.