to answer some of the questions, i can say:

initially, in oct when things started to change, so did i, changing or acting on what h said were issues - then i recieved the "too little, too late comment".
when h left he said it was to think about what was best for him and h needed to see if this would make him happy - for now i would say yes.
when h first left, i stopped contact via email, text, ph or anything and h initiated contact - he asked for space and i have given that.
it is hard for someone to notice a change when they are not around to see those - i do not go where places i know h will be, as i do not want to have an ackward situation and know h will only speak if our d or gc is with me - chances are if i am alone h would not speak.

so, my only hope is for a to end and h to realize what they want.... to remain m or move on. i have to hope and believe h will realize the age difference is too great to really amount to anything and ow is the same age as 2 of our children - which is gross to say the least:(