I have suggested doing lunch with the three of us, I have suggested having us introduced so that things won't appear so suspicious and we can come to some agreements, and I have also suggested that he talk to her about us so that she knows the level of our relationship. This IS NOT the first time we've had this conversation. The same things that you are suggesting I've already done, so what now? It seems to me that she is just disregarding everything that he or I have said. If he asked her to leave him space at the office so that I don't feel bad about their friendship, what real FRIEND wouldn't respect your wishes? I certainly wouldn't treat my friends that way. I want to be as mindful of your wants and needs as I possibly can if I'm your FRIEND! Especially if you are in a serious relationship.