My sitch is similar in that my infidelity was 2 years ago and it "reemerged" in April of this year. Truth be told is that it was still there all the time in a similar way as yours -- W not wanting to re-engage me, W dreading and avoiding coming home, W hating weekends with me. The hurt and resentment was still there all along and finally boiled back to the surface.
As hard as it is, don't tug of war with her, don't try to convince her she can get over it or if she tries X, Y or Z maybe she can get over it. See TimeHeals msg and my earlier msg. The more you fight her or suggest solutions, the angrier you will make her.
Get yourself busy doing something for yourself that makes you feel good and that is positive/attractive. Regular exercise or reactivate hobby or brand new hobby. Don't focus on her, because then you will be there for her to focus her negative emotions on.
Me-53 W-49 D22,D18,D15 T-Since-12/2001 Married-9/2004 She Moved Out-5/28/2010 Piecing start-04/2011 Now-together Thread http://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=2079304