Codependency:

Living with an alcoholic/addict is abusive, however, codependents don’t leave – and if they do, they eventually get back together. It’s very hard to break up if you’re codependent, because codependents have low self-esteem and they need to be needed. If you think this applies to you try these codependency tests.
You may feel defeated and can’t get out of a codependent relationship, Al-anon and codependency anonymous can help dysfunctional family members.
Codependency counseling is very effective and coaching is another way to help you deal with the situation and when you’re ready, you’ll be strong enough to move on.
Have a question? Just ask
When you're in a codependent relationship, you can drive yourself crazy with what you do -- particularly when you've told yourself you won't do it again. You're angry, frustrated, hurt -- so many feelings. Telling your story (anonymously if you like) is liberating, and also you're helping others, knowing they are not alone.