I am at a loss

I feel as though my world is closing in on me and suffocating me. It does not matter how hard I try to get ahead or what I do I seem to hit a road block. Got my head bit off cause I did not answer appropriately when asked why I was so stressed. I had started to say something like "do you even need to ask" which would have been followed by the rest of my answer but he interrupted me. Then tonight I had arrangements to help with his cover letter and to send some resumes with him but made the mistake of not saying that I may go out after we were done. My bad but apparently that meant I did not have intentions on helping him and had forgotten that I told him I would. Was not the case as I had said I would help him yesterday. Then it was that I would be rushing that part so I could go out. All I had said was I may go out but was not sure since I work in the morning. I was doing the exact opposite as far as I was concerned. Then to be told he does not think I understand how dejected he is that he is not getting job offers and that I at least liked my jobs and he hates everything about his made me feel so low. I said that and was told he was not minimizing anything. I just can not win for trying. I need to leave him but the strength to do it eludes me. I have constant headaches, problems sleeping and I am irritable as can be. This is not how I pictured life at 31....I could keep writing but it seems as though it is the same general pile of shit scented differently each day. I give up