One more update. I talked to him about the points in my letter, but he didn't want to read it. He wasn't ready to process the emotions yet. (apparently, it's just up to me to feel the pain).
Yesterday, I finally got a hold of his cellphone and saw first hand the amount of texting/sexting he is doing with the other woman. He is sending her pictures of our kids while we are out as a family (not mentioning I am there). They went on a vacation to Las Vegas together that I didn't know about. He was very upset that I saw the messages because he knows how hurtful they were. He was very quiet/upset after I saw them.
However, he took off again to the city where she lives and from the texts, I know they will be together again this week (he stays with her even though I thought he stayed at a hotel). I put my letter in his suitcase. I also told him how much he had hurt me, how I am upset he is bringing our kids into this, how disrespectful this is, etc.
M 44, H 46 D11, D9, D5 Married 12 years PA confirmed 9/2011 I filed 3/2012 H moved out 7/2012