you are further into this situation than i am , you seem to have made your mind up , ithink you are correct in your thinking , you and your children must come first , take them away from the harm he is causing to them and you, by harm i mean the emotional and mental harm. you and your childrens health and well being must come first.
i myself have lived with my partners alcohol addiction and my step sons cocaine addiction for 16 years i am now a broken man . trapped in a home i hate , but financialy i can not afford to live on my own , if you can then do it.