Domestic Violence is a way different animal than alcoholism. He didn't get physical with you because he was drunk, he got physical because he is an abuser.
Now he's messaging me, begging to come back and I've told him that isn't possible until he changes things. The change you are looking for would most likely take a couple of years and dedication to therapy as well as recovery. No fast fix here.
Steer clear of him hon. If its really hard just think of your child. Your child cannot defend abuse.
Is there a PO enforce since he was arrested?