I agree with Anvil but need to add that it takes some time to get to that point where we are free of our old issues.
I recommend assuming he WILL be back-as soon as you no longer want him and are working on yourself. Expect it. And expect to WANT to believe that this time things will be different.
You're the only person who can create boundaries with him. Trust me, I've been going back and forth with my AH for nearly 6 years. We've seperated three times, he dumps me treats me like garbage, I leave and become independent and then he comes around all charming and promising. Just when I thought I was strong enough to say no.
We have children and property together, so that make NC more difficult, but honestly no contact is the way to go to get your head together and see things clearly.
Good Luck