The Catcher in the Rye Chapter 4 Answers

1) The relationship between Holden and Stradlater was that they were toomates. Also Holden gives borrowed things to Stradlater, like his coat pocket, but even if Holden do that, Stradlater took Holden things without permission. For Holden Stradlater was handsome, and in love with him, but was a "phony bastard" cause he was friendly only for doing favours for him. For stradlater Holden was a "hot-shot" on writing, and a helper to do his homework or to provide him things
2) Holden was apparently in love with Jane Gallagher, from about a couple of years when they live near the other. He know how shes family was, and also his strategy on chequers. Anyway he can't stop thinking about her
3) The reason that Holden gives for not going downstair and saying hello to Jane was because he wasn't in the "right mood" that he must have to talk her. But I think that he was a little scared or nervous to talk her again after all the time that he doesn't see her