I'm sorry that you are at such a low ebb, Bump. It sounds to me too as though you are depressed.
If that's the case, your DH can't help you - it is a medical condition beyond his power.
My DH suffered with a bad depressive episode a year or so ago, and it was so hard for both of us. Absolutely exhausting. As the partner of a depressive, I found that I could (and did) give hour after hour after hour of time for talking, counseling, comforting and it made no difference whatsoever to him. He was still depressed.
Don't get me wrong, I understood that it was the illness, and that however miserable I was with the situation, he was suffering 10-fold. But it was interminable and I often reached the end of my tether, and felt that it completely ruined the quality of our life together and that there was no room for me. I considered making a more drastic move - eg leaving him to get on with it for a few days - because I felt like I was propping him up and that he was relying solely on me for support, rather than seeking out other solutions such as therapy or medication.
If your life has been like this for almost a year, your DH could be utterly exhausted. I know that it isn't easy for you to see past your own misery when you are depressed but your DH would appreciate it, I am sure, if you talked to him about how things are for him.
If your situation is similar, the best way you can deal with this is to devise a plan of action to cope with your depression which doesn't involve your husband - medication, therapy, change of diet, exercise, activities outside the house and hobbies. Then tell him that you are finding a constructive way forward, that you appreciate his support so far and that it has been hard for him too. Tell him that you are going to do everything in your power to get better. Tell him that you love him, and that you want him to stay, but appreciate if he needs a break.
I wish you all the best.