golf mom, Your screws are still in tight...no screws loose in your brain. When he says things about the fact that you've completely lost your mind, well, he's projecting. It is his way of deflecting the truth of what you've told him. He doesn't want to admit that what you've said is the truth. Why? Because if he agreed w/you, that would mean that reality has set in.
Yes, he considers you the babysitter and when he gets tired of playing Disney Dad, he can then drop his son off and say that he spent time w/him. A sad case of selfish "me" song, if you ask me. I'm glad you called him on his bs today.
Don't drink the kool-aid he is serving up. In fact, I believe you deserve a nice cold long island ice tea!
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.