I think sometimes people keep going back not just because of addiction to drama/abuse, but also out of fear of being alone. Not knowing how to be alone. It might feel like it’s addiction to that particular person but if there was another one available, then maybe he’d suffice too. Just not being alone. I am very familiar with it. I dated and went back to some not so stellar dudes because I didn’t want to be alone. Getting to a place when it’s ok to be alone could be very healing and liberating. Not easy but doable