1) Go as dark as possible on him - keep conversations to a minimum and about daughter only - keep those conversations to the point - you be the one to end them - stay away from R talk - do not be available to him
2) GAL
3) Detach
the only way that you have a chance if he starts to believe that you are becoming indifferent and are beginning to live and enjoy life without him.
This will take a while. Unless and until he begins to miss you and wonder about you, and what you are doing, you don't have a chance. You are also going to have to let this thing with OW play out for a while. Let the glitter of that R wear off.
Good luck.
Denver
M 43 X 38 T 13 W moves out of home 11/2010 Roller coaster from hell 2/2011-5/2012 I request divorce 5/2012 W moves home 6/2012 Good time 7/2012 - 1/2015 I leave 3/2016 process of divorce