I have just been reading you story. I wish you the best of luck during your conversation this evening. I am glad that you are calm about it, that is the best approach.
I had a convo with my H last week too. I was nervous but told him very calmly that its over and I wanted out of our M. Its really hard, but you can do it.
Me 38 H 39 M13 T18 S6 S9 Bomb Drop 11/11 Moved Out 7/12 Still have hope. No OW that I know of..