He has clearly decided to have no financial ties and that is NOT going to change. So you need to work from that basis and work towards financial security for yourself.
You run a business from home. What are you doing with the income from this? Because you should be pouring it into savings and pension, given it is not going in to running his house.
Could your business be more profitable? Are you taking it seriously, or regarding it as 'pin money'? It's possible, because he is paying all living costs now, that you have not applied yourself to it enough. Give yourself a shake and increase your efforts - should you split, your business will be your living.
You own a property that you rent out. Does the rent merely meet the mortgage, or is it also income? Again, savings/pension all income.
Keep it in mind that you could require to end the tenancy and move back in there.
To be honest, you are in a better financial position than may women in similar situations.
Stop letting this situation drift, giving over control of your future to the whims of a man unwilling to commit to you. Take charge of your life and future. Work towards financial independence and security.
And ask yourself why you allowed yourself to get into this position. I'm not judging you OP, but you need to answer that question (to yourself, not me or Mumsnet) and use that information to protect your future.