Think of an old best friend passing through your city -- you adore seeing them, just think they are fabulous, are really interested in what they are saying -- then, poof they are gone and you are perfectly happy to go on with your own life...
All this stuff about OP going and them not being gaga again over you... Well, I guess you were secretly buying into the idea that their lack of interest in you was about OP. Guess what. Michelle is right. It is NOT about OP, so OP leaving won't make them gaga over you.
NM, what is with this cover story for why you want SO to stay over? Sure, I guess it is more convenient for both of you, but convenience isn't really a good reason for having any man in your bed. Get honest with yourself here. YOU WANT IT TO BE about being with YOU. It probably is... Convenience isn't a good enough reason for SO to stay over with you either. It is probably a bigger move for him than it is for you even... Anyway, try to get real about this, at least with yourself.
I suspect that your fear is that it is just convenience on his part. Again, this is highly doubtful. But, if you need to know, you need to know. "H, I want you to know that I'd really love you spending Saturday night here as my P and as our kids dad. I love that feeling and I miss it. But, I'm really scared that in your head it is just a matter of what is convenient in terms of you playing easter bunny. I guess I don't need any guarantees or promises, neither of us can now where this is going. But I do need to know that your staying here would be more about us than just an easy place to crash. That wouldn't be good for me and I need to look out for myself here."
If it really is about convenience *for either of you*, I suggest the couch or a hotel room. Priceline and hotwire always have good deals.