Why is it so hard to just...I dunno, quit? Totally.
Now that's a huge question.. I suppose the same could be said from the other side.. "Why don't they just LEAVE the relationship?".
Addiction is a curious thing.. powerful, life altering.. if any of us could answer either of those questions, this board would be uneccessary, as would treatment centers for addiction and codependence, and (on and on).