Makes perfect sense. We won't see each other again after all this shit is taken care of so we shouldn't see each other now.

[ Alec... If the thick sarcasm wasn't a clue... ]

Idiot. That's all the more reason to spend time together. I don't want to make the same mistake I did back on my Earth. I spent centuries away from Aziraphale just because we weren't supposed to be together. We should live for the now, how do people put it 'make memories'? I don't see the point in squandering the time we do have.