You've got to detach and distance from him and his drama, or it will drive you crazy.
He's back and forth; and showing jealousy at times, because he's trying to control you, keeping you sucked into his drama.
And, as long as he is allowed to do that, he continues to control the situation; AND you.
Get off the rollercoaster; and STAY OFF; it's only going to drive you crazy in the end.
He will eventually decide what he wants; but you need to get to a place where his antics won't bother you.
Learn to view him as the stranger from up the street; and stop contacting him..it does no good, and makes you even more of a mess.
Hon, there's nothing you can do for him; so let him go to his own devices.
LET HIM GO; you can do NOTHING for him, at all...his head is not in a good place at the moment.
Take care.
Remember, as each person is different, every MLC/Transition is different..what works for one may not work for another. Most of the time it is trial and error for ALL involved.