QS: You just said your biggest fear is your W running to the arms of another man... that there is no coming back from that. Well, I'm hear to tell you there is. Not that you want that to happen, I understand. My 1st H was LIVING WITH the other woman and begging ME to remarry him! So, your biggest fear is unfounded. Sure, at that point you might end up like I did, not willing to reconcile, but I'm just proving a point here. If you can confront what you feel is the worst case scenerio, then you know you'll be OK no matter what. And I'm not saying that is what your W is going to do... Just sharing my past.
Hopefully the 2x4 knocks you back into Bringing Rain mode and you realize you're worth more than being treated like crap - no matter what W does or doesn't do!