@Flowerchild1
Despite what you say, no, you don't love him, you love what he can provide for you and DS. Now, before you get into a huff, understand that I'm not saying there's anything wrong with that, on the surface.
But you have to understand that a 'marriage of convenience' (MOC) can be very INconvenient when it comes right down to it. Because you are signing up to a life of 'what he wants' not 'what WE want'. He is in the driver's seat and you are just along for the ride. And he can 'kick you out the car' at any time.
And at the end of the day even if you marry the chances are you will walk away with nothing or almost nothing, either because he has tied up his assets right and tight and no longer has use for you or because he dies and leaves it all to his DC (as he should).
You also have to consider the damage he may do to your son. It's pretty clear that he doesn't give a shit about him and will probably 'block' any attempt by you to help him get ahead or enjoy his life. Your son will see this man's children & grandchildren get everything from him whilst he gets nothing. Is this fair to your son?
So, if what you want is a life of fetching, carrying, cleaning, agreeing, gritting your teeth, and having crumbs tossed your way only to end up with very little, then continue on your path. But you better be prepared to STFU because you have no right to complain. You know what you're signing up for. Or you can realize that as hard as it is to work full time and run a tiny home on a shoestring and having to do without, it can be better to do that than spend the rest of your life as an indentured servant.