My W is so similar. Cold as a robot now too. Says the same stuff about how she has felt through history. It could be a revision of her memories. On the other hand, maybe she was legitimately unhappy and either didn't know why or thought it would get better with time. Maybe she thought another child would help.
I remember my W saying that she kept thinking "I'll be happy when..." and it never came. We have the house, cars, vacations, kid...and she still wasn't happy. Therefore, in her mind, it must be something with the marriage. This just isn't where she's "supposed to be" in life.
Once she made that decision...she was ready to go and nothing could stop her.
Me: 35 W: 31 S:9 M: 10 years Together 13 MySitch - Ups & Downs She moved out the day before Thanksgiving 2009, over 13 months post-bomb.