Legna, all you can really do is temper all of your decisions with the knowledge that someone in the throes of addiction isn't in the best state to make very rational choices. As you well know we can often do our best and life still keeps throwing us curve balls. Ask yourself what it really means to act out of loving kindness in this situation and follow your heart.
I hope it all works out and the both of you have a long and happy life together. Sending you both good vibes and best wishes.