The wisest information I’ve seen on this board is “believe none of what they say, and only half of what they do”.
I would tell him you need time and then think about it for a week or two. Then I’d sit down and very simply and calmly explain that you want the marriage too, but that his actions have broken your trust. The only way back from here is for that trust to be built very slowly, over time - through actions rather than words. Explain you won’t go back to how things were, and something completely new needs to be built from the ground up. Then thank him for listening and get up and on with your day. Don’t get drawn into a long relationship talk. His actions from that point forward will show you if he’s genuine.
