You sound really angry op. So I'd take a step back as anger can cloud our judgement.
Firstly I doubt there was anything malicious in the way he has treated you, he is not taking you for a mug, it sounds like the situation has evolved to what it is.
There is nothing wrong with you wanting more. There is nothing wrong with him not wishing to take it further at this stage. I doubt this is he has strung uou along, more his feelings have solidified as time goes on.
It also doesn't mean he will never want it, it doesn't mean he will either, just simply none of us can predict the future and how we will feel.
I'd not kick off at this stage, but I'd pull back for a few days and have a think. Then I'd talk to him and try to understand his feelings better.
You say you love this man, you want to marry him, live with him, yet at the first sign of hesitation you're accusing him of treating you like a mug, complaining he is taking advantage and threatening to end it.
As said, anger can cloud our judgement, so maybe recognise that, simmer down then try to calmly work your way through it