If I’m honest, my elder sister pretended to have kidney cancer when I was 15, and she was 17. She didn’t actually say it, but she shaved her head, stopped eating so she’d get really ill, referred constantly to when she was “gone”.
Not only was I petrified about losing my sister - who had been rehoused at 16 by social services because our parents were violent and emotionally abusive, and was my only hope that I’d escape and could live a normal life, and that I’d have her there as family... but I had to have a lot of checks too, because I have a transplanted kidney. It was horrible. I could be likely to die, too. I could lose one of my sisters in no time at all. I worried about her looking after herself, about her self confidence, about everything. Every reference to dying that she made hurt us both.
I haven’t forgiven her. I’m sorry, I know she was young, but she knew what she was doing. It’s a whopping lie to tell. I can’t forget it, but I also don’t message people that she makes friends with, but it made me wary about anything she said and we have no relationship now. It was the giant crescendo to constant little lies...
I think the advice to get rid of Facebook is good. It seems either this person who has messaged your new friend is still very hurt, or they’re not well, and Facebook provides a way of them contacting anyone that you’re in contact with.
I’d recommend counselling for both forgiving yourself and understanding why others may still be struggling. I had it to understand why my sister could tell such a horrendous lie, and how she could pretend she didn’t have long to live... it didn’t make me forgive her, but it did help me.