It's not all lost. It could work out well as at least she got to see a glimpse of the person you've become.
Now when it comes out that she's going back with OM, not going back but not ready to recommit, getting angry that you won't let her cake eat the way she wants too because she's trying to lead you around by the nose expecting you to give her whatever she wants as she teases you with the possibility of R all while she's medicating in other ways you don't know about...just be ready to set your standards higher.
I don't blame you for making it too easy...but now that you've seen she's not your W but instead an addict that is trying to play you, grow up and use that information.
My IC said "You are up HERE (high hand), she is down HERE (low hand). If someday she wants to come up and join you, you can think about it. But you cannot join here down there."
So shed a tear that she's succumb to the much of the world and let pain/resentment drive her to bad choices. Shed a tear for the woman you used to love. Then go take care of yourself and stop longing after a fallen angel. Your love can't save her and is only going to hold her back.
But...as I said. As you move forward and TRULY detach. She will have the memory of the week you spent and the person you are. Maybe someday that will motivate her to change. But you can't give her any more or you will motivate her NOT to change.
Make sense?
Me:38 XW:38 T:11 years M:8 years Kids: S14, D11, D7 BD/Move out day: 6/17/14, D final Dec 15