Bipolar Boyfriend

My boyfriend who I was suppose to marry, called off our marriage without giving any proper answer.
His office was too crappy and he had crazy mood swings. But He was so much in love with me just before breaking up. We are not in the same country So I can not even go and meet him. We used to talk for hours on phone. But last week he broke up with me in like five mins. And I felt I was talking to a different person only. I don't know what to do. Losing my mind here. He has taken this impulsive decision and I just pray everyday that he realises and comes back to me.

I would be glad to know how unstable he is before getting married or having kids. Consider yourself lucky.