Read Gucci's post again...its the first thing I thought of when reading yours. I know it sucks to hear, but chances are very high that your W is having an affair of some sort.
Is she secretive about computers, phones? Spend a lot of time on either? Go out alone a lot? Dressing different, etc?
Look for the clues, but don't ask her or accuse her, she will deny, deny, deny...
M39 W41 Two children WAW bomb dropped 11/7/09 Piecing Aug 10 - Nov 10 No longer piecing...Nov 10 Separation Jan 11 EA ends again Feb 11 Piecing attempt #2, Mar 11