I have a nearly-16-y-o daughter, and I can see my controlling tendencies being a MAJOR problem for our relationship.
If nothing else good comes from my H's walking away, at least I will have woken up to the fact that I have these problems in my interactions with the ones I love the most. I try to do what's best for everyone without taking into account that others may not want it this way. And I'm so much older, so much more knowledgable, used to being the expert, etc, etc. Might work in my job, but NOT at home.
Now if only I knew how to translate my understanding of my interactional problems into some different way of doing things! Pos rft is one great tool, as is natural consequences (but this is so hard with kids and others we love).