I wouldn't send any messages to him explaining why marriage is important to you.
It needs to be something he wants to. Before marriage, my DH (then BF) wanted us to buy a house and live together..... And see how things went.
I said I wasn't buying a house with a man unless I was married. He seemed hesitant. I proposed we took a break so he could think what he wanted. I was prepared to walk away, but he cried. He didn't want that.
Soon after he proposed. We went to about 2 shops and I chose a ring.
I think I'd have told him to stuff it, if we were still looking for a whole year... But I'm not always that patient unfortunately.
Stick to what you want in a man and don't be railroaded by him.
The truth is, if a man said from day 1, that he never wants to marry... Many women would steer clear. A lot of women just settle or accept no marriage.
He knows that it will be hard to move on to a new relationship and be honest about it from day 1. Most women want marriage when they have children.
I can see him deceiving the next person, with let's have a baby first... And unfortunately if it's a woman who's bio clock is ticking... She usually caves.
He knows that the issue of time isn't a concern for you and that's why he's angry about you not agreeing.... Because you can move on. He is the one who really wants a family soon.
You're very smart. Stay that way