I will second MrBond's comments... My X said those words to me and there wasn't somebody else. I think perhaps there was a vision of who that someone else would be, but there wasn't actually someone.
Yes, quite right. In the case of WAW's it seems there often is NOT an OM. There wasn't in my case either. But like you say, there probably is an imaginary OM that they're hoping to find if they can "escape" the M.
