He pretends he didn't hear them.
negative.
Holden and Ackley share an intrusive friendship on Ackleys part more so than Holdens. However, it is viewed as an unusual friendship because Holden states he doesn't like Ackley and on many occasions hints for him to leave him alone, yet they talk a lot and even spend some time together. I don't personally believe Holden dislikes Ackley, I simply think he needs a different sort of company therefore he gets annoyed and aggravated with Ackley.