Ouah, you got some great responses and not much to add.
No one is ever trapped in one place though, even if it might feel this way more times than not. We always got choices and it's up to us which choices we want to make.
I don't think we can tell you do this or that as it needs to come from you (same as the addict: it needs to come from them to want it out) but maybe it'll be good if you take some few steps back to try to see the big picture from outside the box. Maybe it'll help you see what is best for you.
My best advise, as i have experienced it myself before, is to temporarily separate (ie go live at a friend or family or just take a long holidays or if you cannot just take a weekend away from him -sometimes that's just what it takes to get things straighter in ones mind). Doesn't 100% mean you will come back with an answer, sometimes it takes years of that, but you might, and that's worth the shot (and even if you don't have the answer at the end of your "get away" you still have the chance to take a break which can be good?)
Take care
Carine