I'm so sorry that you're having to make these difficult adjustments. You will be ok. Even though it doesn't feel like it fit now....you will.
It's so sad that love isn't enough to conquer addiction......there would be no addiction if that worked. We all love the addicts in our lives. We do understand.
Here's a link to the eBooks from Nar-Anon. There great information in them to help you with those coping skills you're looking for.
eBooks | Nar-Anon WebStore
The SESH and the 31 Days are both excellent. You can also get real books through the Nar-Anon site but I've got these downloaded on my iPhone so that I can read whenever and wherever I am. It does help.
You aren't alone. We understand the anguish you feel. A burden shared is a burden lessened.
gentle hugs
ke