I am sorry that treatment didn't produce the results you had hoped for.
Your AW is far from being in recovery, even if she's not using yet.
Believe me when I tell you she hasn't dealt with any of her real issues in spite of going through treatment. She found a distraction from having to do that.
I have yet to see a 'rehab romance' produce anything but disaster in the end.
You deserve much better in your life, including a partner who is loving, kind, and loyal. :ghug :ghug