No, there are no winners, except maybe OW. But we have no proof she is in the picture.
You have taken the blame for much too much in the past. This is HIS decision. You have tried everything to hold the family together and allow him to achieve his dream. If he throws it away while discarding you as the sacrificial lamb, he will have to take responsibility for it.
He sounds so much like Kalni's H. And I think he will react like Kalni's husband. When you have moved on mentally in your life, he will have 2nd thoughts. Not until then.