Originally Posted by
Ituvia 
I get that intellectually. I issue threats that i am going to leave but don't follow through and get sweet talked into staying. I am not sure why i don't seem to be able to leave him.
Quite possibly because your self confidence has taken a battering from dealing with his addiction. You have to take the first steps to break free from that type of control. The more you give into it, the deeper you emotionally invest, making it increasingly harder to let go.