You can ask him but, as I don't think you'll get a straight answer, it seems to me you're best advised to save your breath.
My instinct, and it seems yours too, is that there something's going on in the next few weeks during which time he wants to be able to present himself as single man with no encumbrances.
As for the 'no intimacy' during this nonbreak; realistically that's not going to happen unless he's getting it elsewhere but even if he is, in his mind he'll still be able to present himself as a free man.
I daresay we could while away a good few hours coming up with possibilities to account for this very precise period of time but, although we can most probably engage in some very creative thinking and more than a few laughs over a
or 10, the fact is that only time will tell if either or both of us have hit the nail on the head with any of our theories.
As cenicienta has said, nagging a man into the registry office would not be a propitious start to any marriage but, tempted as I am to agree with her that you end it and walk away with your dignity intact, I will stick with my suggestion that you go absolutely no contact with him for 2 months while making it absolutely clear that you're not going to be sat at home moping or pining for him until he puts you out of your misery arrives at a decision.
If you're worrying about the bilogical ticking clock; don't be. You've got years in which you can meet and marry the father of your future dc, and I'd be very wary of having dc with a man whose mind could be tainted by his family and friends' opinion of me.
With all of the additional complications you've alluded too, I have serious doubt that this particular relationship is 'the one' for you and I suggest that you spend the next 8-9 weeks getting 'out there' and having fun - which seems to have been a quality that has been lacking in your life for some considerable time.
I know that can be easier said than done, but if you should experience any difficulty in single-mindedly pursuing other goals for a change please come back here for solace, support, and the uplift of spirits that can come from conversing with others who've been where you are now and who are now happily ensconced with spouses/partners who'd cheerfully crawl over broken glass and walk through fire to be with them.
You deserve no less, honey. Set your sights high and don't settle for second best.