As someone with Bipolar I, a father with Bipolar II, and a mother with Bipolar II, I’ll tell you what I think: There are countless possible explanations for his behavior, and one of those possibilities is Bipolar. From what I gather and how I see it, he experiences full-blown mania as well as very low depression. Depression alone wouldn’t account for his erratic and manic-sounding behavior, so it’s possible that his diagnosis of depression is incomplete (which is my very-unprofessional, practically-ignorant point of view).

Yes, I believe his behavior and expressed feelings would meet some of the criteria for Bipolar. It could be a combination of issues, no issues, or different issues, but if I went to my own psychiatrist and told her I had the experiences that your ex has had/is having, I am certain that she would diagnose me with Bipolar, at least.

Hope this helps! *Hus*