I also have battled with depression most of my life. I would definetly talk to your doctor about it. However, if he decides to try you on an antidepressent be aware that most of them cause weight gain. This doesn't mean you shouldn't take them. You might want to weigh the pros and cons with your doctor and there is one wonderful drug called Wellbutrin that does not cause wieght gain. But different people react differently to different drugs. I love Wellbutrin but alot of people have bad reactions to it but that's the way with all drugs.
But drugs aren't the only option it sounds as if you may have a lot of resentment towards your husband and sharing with people in this forum is a great way to release some of that. You may also want to consider a support group or an individual conselor. Remember that there are a lot of issues that we as dieters have buried under food and now that we are losing weight they are coming to the surface. We also had a layer of fat to hide behind allowing us to not have to face ourselves or the world.
When you are trying to sabatoge yourself ask yourself if you will really feel better if you eat that food or if you don't go for that walk. In the long run you are only punishing yourself not your husband.
Hang in there and keep talking about your feelings.