Your husband doesn't know what he wants, so he wants to keep you available as an option. This is why he is worried about you and what you're thinking. My W was (is) the same way. I remember she told me that she was worried that I would leave her; yet she is the one that openly talked about leaving!
And yes. This is the hardest part. He has moved out of the house and filed for a divorce...yet is suddenly scared to death I'M going to move on. What the??