Do you think Pip is really happy for Joe and Biddy? Do you think he's jealous?

Im my opinon, Pip is genuinely happy. Two of the people he loves best have found happiness.

in my opinion, he is envious. it is used by Dickens to show the irony that pip wanted to increase his class and wealth to find happiness and fails, however joe, who Pip is embarrassed by and sees as socially inferior is happy.