Hi!
One of the examples of relationships you can find in chapter 16 is when Sam goes to the comic store after cutting off his hair with a penknife, and he runs into a boy his age.
The boy knew he was from new york because of his accent and then they talk for a while. A friendship starts forming and we can see this because Sam nicknames the boy “Mr. Jacket”, as earlier he had talked about the deerskin jacket he was wearing.