passage/ Question

"Well, you could see he really felt pretty lousy about flunking me. So I shot the bull for a while. I told him I was a real moron, and all that stuff. I told him how I would've done exactly the same thing if I'd been in his place, and how most people didn't appreciate how tough it is being a teacher." (Page 12-13)



Why can't Holden stop thinking about his old neighbor, Jen Galligher?