Sorry to hear that H is being such an ass! It all has to do with you pulling away when he thought he had control. He immediately suspected an OM. Why? Because he has been unfaithful and walked away because of it, so that's the only way he can explain why you're walking away. He is losing control, and is now grabbing for what he can. His pride is hurt and that is what brings about his horrible behavior.
I hope that he will see the light and figure out that what he is doing is just hurting all involved.
