So you have two kids, a home etc toghether, you know there is a ring and you intend to get married but he's messing about regarding actually committing?
He's not old fashioned. Trust me.
I just don't get why anyone would a) think there was any romance in this and b)put up with it! There's no surprise - its more a form of slow torture for you really.
Anyway I'm an old misery guys I guess and I do hope he pulls his finger out and actually asks you before you combust ŵith excitement and that you both have a long and happy life together. And no YANBU.
I'd tell him how I felt about it, that I was so excited and it felt like the next chapter with the new baby on the way and that although I knew he wanted to do a surprise and special proposal I wanted it to be soon because I loved the ring and wanted it to happen. He has plenty of opportunity very soon with Christmas/ New Year coming up and personally I wouldn't want to be hanging around! Be careful not to ruin any plans he might have to do it over that time though, I'd be sounding him out first! Congratulations!
What a ridiculous situation... Tell him how you feel. A proposal when you've planned so much of the wedding, have the ring etc is just so fake a total piece of theatre to boost his own ego when he tells people in future how he did it. A nice anecdote at best. The kids and stuff are irrelevant as I've known people genuinely surprised by a proposal after even 20 years together. But it won't be a surprise it's not a proposal when you first agreed you would get married that was more like it. Many couples even just discuss it and the announce their engaged.
Well I think it's nice that he wants to do something nice! I definitely wouldn't piss on his parade by demanding the ring on a certain day like some people are suggesting! If it's something he's excited about and you love him then of course you should wait (as you obviously will) as long as it's happened in the next year that is!!