I can't tell you how to fix your relationship. I'm not even sure you should. But I can tell you how to survive.
First. Stay Alive. Sometimes thats all you can do.
Second. Maintain your health as best as possible. Eat. Sleep. Bathe.
Third. Maintain your job and a roof over your head. No breakdowns at work. Save those for later.
Fourth. Remember to get out of the house. Do something. A walk. Anything.
Fifth. Medication. real medicine. Fluouxetine (prozac) capsules happen to be on the $4 prescription plan at Walmart. Cheap and effective, see a doctor.
Last. rebuild as you are able.