In my experience I could not imagine staying involved with an active A and being able to be healthy. I want a partner, whom I can trust and rely upon. You cannot do either of those with an active A, it is the nature of their disease and mindset while using. I used to compartmentalize his drinking and lying and really believe that I could predict when he was lying. I assumed he would never lie about me, our relationship, our future or cheating. He did lie about those things and more. It took months to figure it out as I had to find out from others. He lied and would never admit it. If you can take on the liklihood of that, stay detached and be able to be happy then maybe you could remain invloved with an active A. I am not that strong.
Note: mine left me and I was devastated. Never saw it coming, so even if you try to stay and think you have it under control, you don't. The disease makes people unpredictable.