I'm also with kml...not sure about confronting with OW there...but if you have proof, I think you should bring this into the open. Otherwise, are you happy like this?
From my experience, you are in for potentially a very long road if you just let things run their course. If you love him enough at this point to endure it, great....but you do not seem happy and I don't think he deserves to be treated with kid gloves.
M 44, H 46 D11, D9, D5 Married 12 years PA confirmed 9/2011 I filed 3/2012 H moved out 7/2012