Unfortunately time is one of the best strategies here.... and avoiding snooping, every time I fall into that trap my mental/emotions reset.
As time passes you do tend to focus more on yourself and less on W and OM, look to your S - that's one of my best outlets, trying to figure out how to be the best Dad possible.
Ask yourself what can you possibly gain by focusing on W and OM other than hurt feelings and anger... knowing more will only hurt you more. There will come a time and place for the truth to come out if your W chooses to come back, and if she doesn't you can move on without having the increased pain that focusing on them will create.
I kind of had that realization a while back but its so easy to fall back into that trap as I find myself now researching MLC that I think she's in.
Me: 40 W: 45 T: 13, M: 11 1 D: 9
Suspect A 6/15 ILBINILWY 8/15, and 3/16 EA/PA Discovered 3/16 EA admitted 3/16 W Moved out 4/16 W opens R talk and says A over 1/17