Can he get in the house anyway?
He may "help himself" to your stuff if things keep going downhill.
Have you thought of changing the locks?
Maybe you should pack his things for him and be ready to leave them
outside a locked door instead of letting him in again.
That might anger him, but you have a right to feel safe.
(Ha--I just saw needingabreak and I gave the exact same advice and posted it at the same time
)