He will never, ever, ever, ever feel differently about money. By age 28, a person's attitudes about money and paying for stuff are hard-wired. An army of therapists will not change this mindset.

That's why I don't favor trying to diagnose your husband, which I understand you are not trying to do. What's important is the behavior and whether this is behavior that you want to live with. You have not put any financial strain on him that is beyond what husband's typically do for wives.

You don't leave the house to give your husband a break from the marriage. Marriage doesn't get turned on and off. When a married couple are real irritated with each other, which is totally normal, one sleeps on the couch, or in one of the spare bedrooms.

Regardless of what you did, or who left, you would have come to this point anyway. He is a miserably unhappy man. It's not due to his job or his wife. He's just miserable. I don't consider this a medical problem, though psychiatry and therapy might be of some small assistance to him. He is who he is.