I'm sorry your having problems with your marriage. but the others are right, eating comfort food will not solve your problems. Have you considered marriage counseling ? If you can't afford therapy, do you have a trusted religious figure (say a priest, pastor, rabbit, etc...) who could mediate for you ? Some houses of worship do have couples counseling. That might be worth a try.
It's difficult to watch a marriage in trouble. What you might try doing instead of turning to food is taking a walk. get some fresh air to help clear you mind. Eating all that food will just make you feel worse later from the guilt. If you're under stress, this is the time you need to do your best to eat as healthfully as you can. Healthy foods will nourish your body and help keep your immune system strong in these difficult times.
Try to take care of yourself as best you can.