This isn't in reference to any specific fic/post/etc, but the idea that Aziraphale will need to profusely apologize and/or beg Crowley to forgive him lands really weird for me.
For one thing, Aziraphale also felt rejected and shattered when Crowley refused his offer to be angels together. But on a much more meta level, the beloved cottage ending of our dreams cannot materialize if Aziraphale gives up on Earth and runs away with Crowley now... Even if they didn't leave the planet, how could they get a real happy ending if they were still looking over their shoulders, waiting for the next supernatural crisis to hit? At this point in the story, Aziraphale has to still believe that a better ending is possible. He has to believe he can make a difference.
There's a great post going around that points out how they're both wrong in the breakup scene, but I think it's also true that they're both right: Aziraphale is right that they can't just stay where they are and pretend everything is fine OR run away, and Crowley is right that they'll be better off without Heaven or Hell.
I'm not saying that no apologies will be necessary in the future, because I think they will be! But I also think when everything is said and done, they'll understand and appreciate the other's perspective better. They'll look at where they've ended up and think, This is so much better than anything I ever imagined for us. And (I hope) they'll both be grateful to the other for seeing what they couldn't.
