No one can tell you to stay or go, that's your decision. My advice is to begin by identifying the areas in your life where you still need your husband and fix them. Become independent.

Withdraw your support and participation in this relationship. Your son gets presents from you. You watch your own kids. You take care of your own stuff, offer nothing.

In short time your dependence on this person (emotionally and otherwise) will go away. He'll either respond by being willing to cooperate with you or he won't and you'll be able to make a decision from a stronger point of view.