You know if you just left your friend to have this relationship, maybe he will bring it back to you. I mean what if you had two people rather then just one as good friend? I mean if your best friend likes him, i bet you trust his judgment that he;s a nice person, and if he is, maybe you could all be friends. If not, i mean if the guy is actually an ***, what a better friend you will be ...having stood by your friends decision without interfering. If these are just not doable by you then Just think of the breakup and how much your friend will need you!!!!!!!!!