Chapter 14 to the end of the first section

I recently finished reading this section and I realized something. Pip is getting really stuck up! Just because he came into some money doesn't mean that he has to act completely condescending to Biddy and Joe. I hope that sort of behavior doesn't continue. I was really starting to relate to Pip. I also am wondering whether this means that Joe and Biddy will no longer be a part of the story. I doubt Dickens would go the whole first section of the book and never mention them again, but I don't know how he would tie them back into the story. Why would Biddy or Joe have any reason to go to London? It's a shame to because Joe was my favorite character. He seemed to so nice to Pip and how does Pip repay him? By being a snotty, stuck-up, disrespectful child who doesn't appreciate the good friends he has in Biddy and Joe.