They all do. It shifts the blame so that they don't have to feel responsible. The only way he's going to feel responsible is if he actually gets what he wants. Take away your friendship. No visits. Write down the times that he has said he was coming over and didn't. Journal everything.
Since you're FB friends (which is weird that he insisted), fill your feed with positive things. Go out with friends and your kids and take pictures that you can put on your feed. If they just so happen to have guys in it, the better.
I can tell you that he'll start turning around once he sees that he can't control you anymore and can't have you any more. Whenever he does come over, have some nice flowers on display and look your sexiest. When you change your dress and appearance, you'll start to feel more empowered and in control.
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.