Regardless of whether a relationship has become codependent, no one should have stay in a relationship that's damaging to their own mental health on the chance that it'll help their significant other get well. "Everyone is entitled to their own choices about what they would like to do in the name of supporting a partner who's struggling with an addiction, but it is unfair for any of us to say what someone else’s boundary should be," Dr. Joy says. And if Grande's relationship with Miller was "toxic" as she says, she shouldn't be judged from wanting out of it.