i think the important thing is you need to let him know

you are serious about this, and will not tolerate whatever he wants to do to you, otherwise he will just ignore your view, to do that, make it absolutely clear if he keeps abusing you (whatever that is) you will get help including police, give him enough warning, if he still won't stop, do it, then he will know you are serious and will take your side seriously, if after that he still won't learn the lesson, then there's no hope he will change, time to think move on if that's no the life you want