Way back in 1989, I had a lady friend who struggled with manic-depressive disorder. At the time, in a way, I think I tried too hard to understand her. It's like I wanted to understand it all at once in a verbal, left-brain, analytic way. And I think I missed some of the feel-and-texture and understanding in the gut. It later occurred to me, hey, she explains something and I understand 60% of it, and that's probably just fine as a first pass. And then, later on if she explains some more, I can understand another big chunk. I'm kind of letting myself arc across the topics as she explains in her own way, and letting the understanding build up over time.
I've read that people in the manic phase can have delusions and auditory hallucinations. That the symptoms can be similar to schizophrenia and it can be hard to tell the two conditions apart. That it generally helps to have someone there with them, but then they can push this person away. Plus, it's real hard to be a caretaker, especially if there are no broader resources to call upon.
Sometimes I wish we could have gotten married, but she went her separate way. I'm glad you got a second chance. 