Is this normal dating behavior for a 33 year old man?

He is insecure and unsure of what he wants. He is afraid of real commitment but enjoys the benefits of a relationship. One argument or disagreement should have no effect on a relationship. There will be many over the course of time. He may be too immature for you and not even realize he is hurting people when he has this problem. I agree with the idea you should move on. He is unstable and you will only be hurt worse. Think of it as a learning experience. I am sorry this hurts you and you did nothing to deserve it.