I would like to say that he is in a "regret mode", but from the bottom of my heart I can't.
The experience I have from my separation from my XH is that they do this things and I do not even understand why.
Sometimes I read your lines and I recall all what my jerk XH did to me. Flowers, attention, kisses and so on. Sometimes I really believed that he was being genuine and maybe he would just reconsider his choices, but then when my hopes were high, I got the distance, the cold shoulder, the selfishness.
I don't know what to say besides that you are doing right for yourself. All what you are doing for your career is yours to keep and will always make you proud of yourself.
You are a good person, but unfortunately, you end up with some insecure, selfish, egocentric, narcissistic, controlling bastard that will need to learn a lot to have a decent life on his own.
I know you H has many qualities too, but is lacking respect for himself, you and the kids. You are the strong link and it's unfair that you need to be.
I guess all I can say from my own experience is that it hurt to be away from our spouses, but it hurt more when you feel they use you, they abuse you because they know you love them, they take advantage on your pain, and that is not cool.
So, protect yourself from further pain and let him be. Don't engage on his games and stupidities. Treat him his some caring, respect, but don't let him hurt your heart anymore.
I am very proud of you Red, from the time I first met you here to this day, I can see how much you learned, and how much you have grown. You are an amazing woman and even with tears, heartaches and wounds you will thrive.