Beth, I know exactly how you feel. My feelings have been all over the place since the bomb last year, May. I tried divorcebusting for several months, and he even recommitted to our M and said he loved me, but it was a lie which he finally owned up to. I now don't trust my H at all, and doubt that I ever will again. I am angry at being lied to. I will get over it, and I will move on with my life, and make it better. But, in all the anger and hurt, I am very sad at the loss of my DH who no longer really exists.
I don't know what advice to give you except to take each day as it comes. Only you will know when the time is right to leave. I feel that if your H is really committed, he would start looking for another job, and break off all contact with the OW. He's playing a dangerous game.
I still can't understand how anyone could put their family at risk like this, but my H did it, and we (my children and I) pay the price for his betrayal. No-one wins, since even if he got together with the OW and is "happy", he will always have the guilt of what he has done to his family. I feel I can hold my head up still, since I tried until I could try no more.
Will be checking in on your sitch, Beth. Good luck!
Me:57 H:52 M:28 Got another lawyer last year and filed. D35,S/D twins28,D22 EA4/04 End? Who knows? "Life is like a mirror. Smile at it and it smiles back at you." — Peace Pilgrim