I'm sorry you are still feeling hurt. It is almost impossible not to take personally the actions of someone who is addicted, but acceptance of that person for exactly who they are -- and not the person you hope or wish they could be -- is key.
We sometimes have to let go of people we care for in order to save ourselves and our sanity. I look at it as allowing the other person the dignity to make their own choices and mistakes. I have learned that the best way to begin to help others is often helping myself first.