neecy, I agree. My H recently moved to his dad's, but I don't know if I could hold out even a little while if he moved straight in with another woman. His main "A" is over, but he is definately leading a single life now, flirting and talking on the phone with girls. I am also one that doesn't know if I have it in me to 'shine a light' back to me.
((HUGS))
Hold your ground. You can't take him back with anything less of what you expect from him. It feels so hard and wrong now, but I think you are doing the right thing.