In chapter 15 of Great Expectations how does Pip give away his real motivations for visiting Miss Havisham?

Pip revisits Miss Havisham at the Satis House ostensibly to thank her for paying for his indenture. He is disappointed at the meeting: Miss Havisham does see him for a few moments, but only to laugh at him when he looks around for Estella. Estella has, in fact, been sent abroad to be educated as a lady.