@Rive.

While I agree with you, based on what we've heard so far, there isn't any requirement to worry about the wellbeing of someone who hasn't worried about your wellbeing.

There's not always a reason to "face the music" and "man up" to say goodbye to someone who is exploitative and manipulating.

Worrying about closure doesn't matter. A truly disordered person doesn't experience closure the way others do. ANY scenario can be twisted into one of self victimization by them.