I don't know if your friend should be putting these demands on you. It really isn't fair. Either she is your friend or she is not. No matter whoever else you hang out with. So do what you want. If she really cares about you she will be your friend. Maybe she is a little hurt or jealous. Those are all naturla feelings to have though. So just be nice to both of them. I guess.
Do you see a therapist? Have you asked them what they think. I can only give you the advice that I would use, there are others that might have other opinions.
Moderator-Depression and fibromyalgia
fibromyalgia, Chronic fatigue, depression,allergies