I think it is perfectly possible to love someone as they are and still not want to be in proximity to the chaos they leave in their wake. To not want to watch them on their path of self-destruction, and to feel like a party to it.
I wouldn't say that I stopped "loving" my husband who went back to drinking after he almost died of liver failure. Rather, I couldn't stand watching what he was doing to his life and couldn't stand the impact it was having on my life. So I left him. I still pray for him. If he were to get well, I probably wouldn't want him back in my life, but I wish him nothing but the best. He isn't a bad person, he is a desperately sick person. But he is the one who holds the keys to his own recovery. Until he is ready, nothing I did would make any difference.