[It isn't a surprising decision, by any means. Crowley doesn't think there's a whole lot that Jon could do that would drive Martin from him completely.]

You've plenty of time to figure it out. [He doesn't say that Jon deserves to at least stew in his mistake overnight, because that'll probably just make Martin feel guilty about it.] Take it easy tonight, hm? Get a bit drunk, fall asleep in the bath, try not to think about Jon being an idiot. I'll even let you put on some awful nineties pop music, if you want. That's nostalgic for you, isn't it?

[He doesn't know how to talk about love or shitty relationships, so he's hoping that he can go this way, instead. Lighten the mood a bit to cheer Martin up.]