Husband has disorders I need tips plz.

My husband is bipolar, manic depressive, and a form of schizophrenia thats not actually schizophrenia, just a slight symptom of it. So he has a lot of mood changes fast. Anyone else have as hubby that deals with these? I can usually handle it and know when to ignore his words, but after a while and him apologizing so many times for same little things, its starts to get at you. I don't love him any less and I'm normally a very VERY positive person and he's more on negative side, but ill find myself getting sad lately when he goes through a mood. Any tips?