Hi, Susie, and welcome! I am bipolar myself and his behavior doesn't sound like a manic episode to me. It's possible he had a personality disorder such as borderline, but I am no expert and I am just speculating. But you might read about that to see if anything about it strikes a chord with you.

I am sorry this experience happened. For whatever reason, it sounds like he is not a good match.

Let's see what other folks say, though.