Don't forget that Crowley gives big " don't you dare disrespect my wife" vibes about his love; For Aziraphale has been there with him since Crowley put the universe in motion as an angel and that never changed despite Crowley's fall, them becoming biblical enemies etc.
Loving Aziraphale has never been an easy task for various reasons, both external, internal and interpersonal ones. And it certainly isn't easy in the current timeline.
But his angel is the best thing that has ever happened to him, and their love is the only constant through and through.
When he walked away, he simply said "don't bother" but still waited outside in case Aziraphale had a change of heart, an epiphany or something. He was hurt, not offended.
They aren't just hot for each other, they LOVE each other FOR CENTURIES.
And Crowley won't just not love Azi or lose his protectiveness for him because his angel is being an idiot right now.
And Aziraphale won't stop thinking about Crowley for a moment; On the contrary, it will only grow stronger as he will miss him a lot ( and their kiss ) till they reunite again.
Never forget that Crowley is at his happiest when he is with Aziraphale; He jumpstarted the universe with his angel's help, sharing his joy with him when the nebula was created. Aziraphale really congratulated him with that cute big smile of his whereas heaven treated Crowley as just another employee; he did their bidding, and when he started to wonder about some questionable company policies, they threw him away, wiping out his memory, without recognising his vast contribution.
He had just fallen and was probably incredibly shaken but Aziraphale giving up his flaming sword for Adam and Eve made his whole face light up and laugh.
Over the years we see him becoming angrier, more cynical and distrusting with everyone else but with Aziraphale, he keeps getting softer and softer. Sometimes he acts like a whiney, grumpy fuck for a husband but is actually so grateful that Aziraphale always lets him complain and get it out of his system, not judging like everyone else does, and most importantly, *not leaving him*.
Because Aziraphale loves him just as much.
And Crowley would say some harsh words to people who bash the love of his life.
When Aziraphale died, Crowley got wasted. He talked about not wanting to become a demon. He basically says that the last million light years have been hellish for him, literally and metaphorically.
He didn't want to get kicked out of his home, rejected from his * birth family* but it happened and there's no going back. Ever since, life has been incredibly hard for him. And if it wasn't for Aziraphale, he would be completely lonely and lost.
And he knows that better than anyone else.
And he knows his love for Azi is much bigger than the sadness, the confusion, and the pain he feels right now.
He says to Nina and Maggie that they have been talking to each other for millions of years, that Aziraphale makes him laugh and that IT'S GREAT.
Crowley's situation and life sucks, but his time with Aziraphale IS GREAT. IT'S GREAT even if there's trouble they have to go through, because they are doing it TOGETHER.
And if his angel could not be physically present at times, Crowley's love for him, Crowley's memories of them, full of laughter were enough to give him strength.
Please, don't bash the love of his life. That would only destroy him more.