Just a personal note I would like to add. I live with chronic depression...ever since childhood. Therapy has helped but it's not a cure of course and meds do not work for me at all. I no longer take them. It's not the same situation as you and your husband; I am cognitively intact but I want to mention. My partner is aware of my depression. Sometimes it is much more severe than others. I do my best but I often struggle. If my partner told me that he wanted to leave (we live together) because he wanted to be alone or to have the chance to partner with someone who does not have chronic depression, I would support him 100% and wish him peace. It's up to him whether he can tolerate my difficulties. I cannot determine that for him. I just wanted to share that truth from a place of care and regard for you.