Money issues are one of the biggies in marital relationships.
My guess is that she perceives that you are headed down a path of no return and she’s not going to go there.
One alternative (assuming money is the only issue). Find a way to split your finances. Agree on the shared areas and cooperate – maybe groceries, utilities, rent, etc. You manage yours the way you see fit and allow her to do what she chooses with hers. It sounds difficult but I know some folks who do this successfully.
