Do I walk away from WAW? (1)

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Good advice guys. I am certainly careful with the BFF. Her role in this is exceedingly complex. She was the one who introduced my W to her '11 AP, and has made a big deal over how I "blame her" for Ws '11 A, a lot of which I believe is my W's doing. Of course, now BFF is dating said AP. it's hilarious to me, again, that I am the one held accountable for my feelings about such a strange situation. BFF is a big part of our lives. Her and W are attached at the hip via phone. And her kids are the same age as mine and are best friends, so it's hard to really get distance from her. During the '11 A, I reached out to her a lot to find out what was going on, and this understandably put BFF in a bad spot, which I no longer do. I've been very careful with what I say to her, but she pries, asking me questions about Ws behavior that she is obviously in denial about, as she should know better than anyone. I repeatedly refused to answer these questions in our phone convo this week, saying only things that I am comfortable with her repeating to W, as she is an absolute sieve. I'm focusing on myself, I'm seeking stability, I am patient, I still care for her and am worried about her. She repeatedly complimented me on my strength and what an "amazing man" I am, and texted after to say it was a great conversation. She is very spiritual and emotional and honestly, I question if she's really able to handle this, as she seems to have some desperate need to validate my W and keep her as a friend. This is understandable but it's still frustrating. I am going to continue to keep contact with her very limited, but it's hard when she approaches me being very sympathetic to my position, as I feel like she's the only one who can somehow translate my feelings to my W. But I can't count on her at all.