What a complete tosser.
What a selfish bastard.
You're three months pregnant and he still can't bring himself to get married. What a CF. He's playing you and he thinks he has the upper hand. Time to remind him you have all the aces.
If it was me I'd call his bluff and find out where the depths of this truly goes.
You say:
"I'll book in for a termination then and you'd better find yourself a solicitor because there's no way I want to share a house with someone who still can't decide if they want to marry me. There's no way I want to have a kid with if you can't commit."
And then seriously think about what comes next.
If you have his child, you'll have to have contact with him for the next 20 years.
Is it worth it?
Some men you have to take down to the wire and show them you're willing to jack EVERYTHING in and then they'll get down on bended knee. Some men are only motivated by a sense of loss. I'm talking from bitter experience. It's only when he saw he'd be alone again that he went through with it. Now 15 years on, he says it's the best thing he ever did.
I'd personally have to test it out and see what his true commitment is because if he says "fine, go ahead and terminate" you'll know what you're really dealing with.
It would be heart-breaking but if he's doing this now, imagine what he'll be like 2, 3 or 4 years down the line.
You need a clear answer. And disappearing with the car and turning phone off is utterly utterly childish. What a wanker you have there. Again, he thinks he's got all the cards. This is a power game and if you want to win you've got to be prepared to lose it all if you want to win it all.
It's time you put the big girl pants on and showed him who is boss.
Give him the ultimatum:
Marriage or it's over and the child may be aborted.
It's really that simple.
Then see what he does. Please update us.