If she is in treatment and doesn't think her problem is that bad...you may want to proceed with caution. Congratulations on your own recovery, please don't set that aside trying to figure out hers.
Trying to second guess what they are doing or what they are thinking, never brought me anything but anxiety and fear. What helped me was going to meetings, learning to work a program that literally saved my life and taught me to live well, no matter how the addict in my life is doing.
Rotaris, you have choices and they are truly yours to make. Nobody can tell you what it right for you. But from where I sit any relationship that doesn't have trust, respect and love is not healthy.
The healthier you are, the more likely you are to make healthy choices for yourself.
Hugs