The friend who is newly successful may still need the ordinary welcome they had before.

Success changes how a room treats a person before it changes the person. Conversations start including requests, jokes acquire a slight edge, and people begin performing either admiration or indifference rather than just talking. The friend then finds that the one place they could be unimpressive has quietly closed. Most would trade a good deal of the new attention for an evening where nobody mentions it.

Greet them the way you did two years ago and talk about the things you always talked about. Ask about their week rather than their achievement. If they want to discuss the success, they will raise it themselves.