I think Sandi is probably right. I think "I'm not happy" often covers a lot of ground in their minds and they don't want to go into the specifics...because I think the specifics are either too ugly (other person involved, etc.) or they're fuzzy and they don't have any real handle on it other than the 'grass is greener' syndrome.
I can say that having no contact with the W has been helpful. I've actually had some anxiety over it the few times we've talked and have generally preferred to avoid any interaction at all. Once you get over that initial 'withdrawal', it really helps.