For the record, M and I did sleep together on the 3 rd date. And I am pretty sure that did not lead to the demise of our relationship a year later
Are you? Maybe if he had had to work for it in the beginning of the relationship he wouldn't have taken you for granted. Or maybe if he had had to work for it in the beginning he wouldn't have put out the effort and you would have known then, instead of a year later, that he wasn't willing to put out the effort.
Slow down. Find out more about this guy. What did you learn about him last night besides that he has good manners and seems to be a physical touch love language guy? What does he do for a living? What are his ambitions? Why did his marriage really break down? What are his medical issues (says the woman with the boyfriend with stage 4 lung cancer)? I know you weren't interrogating him last night, but you must have learned SOME things about him, right? You are doing your research right now, what have you learned?
Look, I'm not averse to a roll in the hay early on - I've done it. But it's not a good strategy if you're looking for a long term relationship, and honestly, it'll lead to mistakes because really, how much can you know about a guy after 1 or 2 dates? And since you get attached so easily, it'd be better to keep your eyes clear until you know more about this guy. Plus you've already seen how making yourself a little less available resulted in him stepping up a little bit. Step back and see what he does next. If he calls you for a last minute date again, you're already booked. If he calls you and makes a date in advance like a respectful, interested guy, take it. But go out, let him pay, and no hanky panky yet.