How do you warn your friend?
There's a guy in school, A, that I used to be om talking terms with before finding out his true character/nature (series of incidents helped reveal this); and thereafter avoided, because I I tend to choose the more peaceful resolution as far as possible. I have no doubt he knows I would rather he stay away. Yet I have a friend, B, he wasn't close to and is now talking frequently to. I'm not sure what to do because said friend has the right to choose who she befriends, but at the same time when she asked why I don't feel positively about that guy I'm not sure what I should say. I don't want to come off as judgy or anything but I feel like I shouldn't just stand by and say nothing. What should I do?
I agree with above. Be honest with your friend about your decision to stay away. Don't tell B what she should decide, just make sure she knows what you decided. And be aware that anything you say could very likely be passed to A. So if this matters, be careful with your wording.