I am not going to mention the financial and legal aspects here because previous posters have done a bang up job of that, but I did want to contribute something.
In my experience, a lot of men don't quite understand life-course lead times the way women do. They don't have that biological clock that forces a lot of professional women who want families to plot backwards from age 40.
This sentence, I think, is key ... I am making a real and very hard earned commitment to our future.
I suspect you are unhappy about the lack of marriage proposal because, subconsciously, you want to get started on creating the circumstances you want in place for having a married family life. You already want to buy a house but you are probably aware that looking at various potential properties to buy and and the day you sit on your sofa in a home that doesn't need any major renovation or redecoration, well, you can be talking about a fair amount of time.
Crikey, even getting through the purchasing process can be problematic -- chains break down, survey come back with serious issues etc ...
So I could understand it if, in your mind, you are taking this into account and seeing that there is possibility you could be 33, 34, 35 before you are actually in a home where you feel safe, secure and unstressed enough to start ttc. And then, you see, there is that nagging anxiety that ttc might not entirely go to plan and you will be already in your mid-30s.
So you may have all this going on in your head, but you have a DP who doesn't entirely seem on board with the programme and doesn't seem to recognise that, for you, there isn't an endless amount of time to just muse upon things -- and this is why, I suspect, the lack of marriage proposal is upsetting you so much. You want to move forward; he doesn't appear to be in the same mindset.
My advice would be to sit down with your DP and explain what you want from life and what that means in terms of personal deadlines for you. You need to say that you want to be married, own a home and have a family, and, because you are now 30, these ideas are no longer just abstract concepts and need considering from a practical and time-based perspective.
It is quite probable that he just doesn't realise some of this. If you have told him, for example, that you would like your first child by 36 (because you don't want to wait or because you want more than one child), he may not actually compute that means starting ttc in the next three to four years. And, again, he may not compute that finding, buying and sorting a house out can take two, three, four years if both of you are working full-time and he works abroad a lot.
In my opinion, you and your DP need to have a serious practical discussion about this. If he refuses to talk about it, then that says something. But you do need to have that conversation and he needs to hear your perspective and you need to hear his.