My good wishes for you getting over your addiction too. I hope the steps work out for you.
I’m not ready for posession either since I believe possession is a last resort.
Also if you don’t feel too comfortable with Belial then there’s always an angel. The other night I read about Archangel Raphael using his healing to help: Raphael - is he the One to Work w/ for Ridding Oneself of Addiction?