Well you're unhappy. You're lashing out at her. Something needs to be done ASAP.

Have you tried counseling? Have a professional try to help figure out what the problem is. Plenty of couples do this.

If that doesn't work, then don't spend the rest of your life being miserable, even for your son's sake. If you don't love your wife anymore and just see her as a housemate, and counseling hasn't helped, divorce seems like your best option.