yes, everything that has been said is right!! manipulation....20 years later for me and i'm finally leaving....don't wait, get out while you can...you are too young to give your life away to his problems and you will be fighting them from now on if you allow him to override your thinking. i have been where you are and gave in and lasted 20 years. now i'm 55 and starting all over again, finally realized that all my help means nothing and i gotta get out while i can and he has to fight his demons alone.
If Jack really loves you, he'll fight his demons without you get healthy and THEN come back to you with something positive to offer because love DOES wait if it is meant to be. you are a very wise young woman!