I feel like I’m sleeping with the devil but I just cant stop being with him. What to do?

You have become dependant on him. It's a good thing that you have acknowledged it, but in order to break out from that vicious circle of co-dependence, you will need as much help as you can gather. It's not just a matter of "getting out", it's the fact that you need to deal with your solitude in a different way, so that you don't have the temptation to run again to the arms of this abusive person. Your family and friends should help you there.

You should not with someone who treats you like crap. There plenty of of other people out there for you. Get out of that terrible relationship.