even with all of my knowledge, my own child fell victim to a money bully recently and was trapped in his own version of H&LL till recently. You cannot force another to learn from your lessons. You can only wait patiently for them to come back home. Be supportive when you speak to them, and let them know you are in their corner. The abused person misses you, and wants better, but isnt alway able to make such choices. Tons of belief of "I can fix him" or "its really MY fault. I provoke him." or "he is just misunderstood. If you really knew him, and how good he is to me, you wouldnt worry about me." Victims tell themselves tons of self comforting lies to keep the circle going. Abusers count on that.
Make time for a lunch with your friend, and tell her how proud you are of her.