Have you considered marriage counciling? I've heard it's great when you have a partner who wants to work on the M. This is your chance to fix things and build a better M, a chance many of us never got.
You're going to need to let her indiscretion go if you want to move past this. Read 5 love languages, it will be a great tool for reconnecting with your W.
Good luck
Me 28 W 27 T 10 M 2 No kids (fertility issues - mine) Bomb 7/20/2014 - EA Confirmed W moved out 9/15/14 W dating OM 11/22/14