I married a man with depression, long term chronic treatment resistant depression. He told me about it on our first date, but I'm no stranger to mental health problems myself so it didn't worry me. Its hard sometimes in that it breaks my heart to see him struggling. And when he's in a low point he struggles to communicate, which makes things difficult. And when he's unwell I have to pick up more of the day to day and parenting stuff. Some days he really has to work hard to just get basic stuff done. In many ways I imagine that there are similarities with loving someone who has a physical chronic illness or disability.
He never stops trying though. His depression is managed most of the time with medication, and he is committed to keeping it that way, he sees the doctor regularly for review and is very interested in new treatments and therapies. He was also the first to spot my pnd and supported me in getting help.
I think he would be the first to say that having me in his life, and our children, has given him things to focus on, (although that alone is not a good reason to be with someone, it helps me to know that I'm making a positive difference in his life) and he's a wonderful dad, hands on and an equal parent. When he is well he is the kindest, smartest, most loving, funny, imaginative, creative, caring person I know, and there is nothing he would not do for me. As you can probably tell I love him dearly, and meant it very strongly when I vowed in sickness and in health.