I’m honestly worried about this friend’s friend. She sounds like she’s using very twisted logic to cover for something else. Why does she allow family, but not friends? Why not move into the mountains, and have it just be Hashem? I would assume something serious is going on there. (BTW Torah is a guide for life. Life includes friends. I have yet to see a place where it says to hurt all your friends, because it will help your spirituality.)
In this situation, I would think it’s extremely important to let go of the anger. Because two possible explanations that jump out at me, say this girl is in danger. (look, I rhymed!)
1)Depressed people tend to push those close to them away. She may not appear to be so, but this is a big sign.
2)Abusive people tend to try to isolate their victims. Is someone in the family trying to isolate her?
I’m probably over-reacting, but even so. Understanding that something completely different is possible, can help forgiveness.