Having Lucifer/Satan standing before them doesn’t seem like a pleasant encounter for Crowley and Aziraphale… especially when it happened 6,000 years ago
they never got the chance to openly love each other. they always had to hide in fear of heaven or hell finding out. they never hugged, never shared a kiss out of love, never sat down to have a talk about their feelings and they spent their last three years of their lives apart.