It really does destroy all relationships as once that trust is gone it’s so hard to get it back. It takes a lot of time and hard work on their part to achieve sobriety before they can ever be truly happy in any relationship. It does seem she’s pushing you away, as maybe these past few weeks she’s finally been able to see clearly without the drugs and is most likely ashamed of what she’s done to you. Denial is what they will do they will say your crazy anything to admit they dont have a problem, I think it’s scary admitting to themselves they have lost control. Time will tell if she stays clean but it’s her problem and it’s not something anyone can control only she can. I would just step right back and do your own thing, and what’s meant to be will be. But once you detach you will find that mentally you will feel so much better it will take time but you will!