I saw right away that my very first post in the Republic of Pemberley was deleted! Now I realize it happened because it contained information about a future event in the book. I am so forgetful- sorry!

The only way this friendship destroying conversation can take place between Darcy and Bingley is if Elizabeth accepts Darcy's marriage proposal, and that is impossible. She must maintain her integrity or she will not be herself. And if she were the sort of person who would have accepted, Darcy would never have been so attracted to her in the first place.

As for Darcy being able to apologize to Bingley, I don't see that possibility either unless he changes his views. In the very midst of proposing to Elizabeth, he expresses joy in having broken up Bingley and Jane's relationship.