I'm FWB with an amazing woman who is poly. One of her partners is my (female) best friend. My best friend and I are strictly platonic. She runs a spiritual group I'm a part time member of, and my FWB is a member of. I became FWB with her girlfriend I think fairly soon after their relationship started. Last night my bestie said I couldn't meet with the group as she wasn't ready. Now I'm not about to snog someone's gf in her own house, but it makes me a bit sad we can't be in the same place at the same time. I'm not talking dating. Individually, my friendship with my bestie and my FWB are very good. I agreed not to go into gory details with my friend about her gf, but I get this sense of reluctance from her not to talk about her GF at all. My FWB has become a very important part of my life, I had to struggle with limerence and accept the relationship on its own terms. But I'm mostly there and she makes me very happy. I just wish I could share some of that with my friend.