He says he's sick of carrying me and I need to step up.
Imho, I think he still sees you as his girlfriend. I know you are married, but the little piece of paper did not psychologically alter his perspective. I know you have a child together, but that also did not alter his psychological perspective.
He does not see the three of you as a family unit, all on the same team. His money is his money, when it should ideally be family money, iyswim.
"carrying you" This would seriously piss me off. As pointed up thread, he would not have the capabity to pursue his high paying job if it weren't for you behind the scenes saving great sums of money for the household, raising his child, keeping his (hopefully yours too!) house.
I agree with pps that, unless he can evolve into a family man, you'd be better off as a single parent. Sorry to say, but I doubt he would miss you-he'd only miss his maintenance money. I think this may be a function of great expanses of time as a long distance relationship, kind of a delayed consequence,