Hang in there, Upwards. It seems pretty clear that you are really strong. ... and he is struggling. And as far as new OW making him happy? Maybe that is what he is hoping for, too. But as we have learned. .. no one can "make" us happy but ourselves. His bouncing around in relationships says nothing about you and everything about him.
Don't be ashamed to grieve for what you have lost. .. But don't sell yourself short, either. You deserve to be with someone as strong and healthy as you. And right now that is not him.
