I've been going through the same thing with my significant other for going on 12 years now. He understands me more now than he used to, having never dealt with anyone that was bipolar (?) before, and it made him paranoid at first, my mood swings. When I got depressed and would cry for no reason, he thought it meant I was cheating and was feeling guilty. If I got mad, it started a fight. Now, he has mellowed with age and experience in dealing with me, so if I get angry and want to fight, he walks away. If I get depressed, he tries to cheer me up. If it doesn't work, he doesn't take it personally. He still has a ways to go, but it's much better than it was. No more "snap out of it."