Don't believe that he was in real. There's no way to know he was even a "he" let alone his whole life story (could be entirely fictional).

Don't fall down this rabbit hole online to seek out emotional validation from other men, since your marriage is rocky right now. "He" sounds like an internet troll of some sort, who seeks out emotionally vulnerable women to prey upon.

Stay away from any/all online communication with men, if you can. I am sorry that you are going through hell with your husband. That has to be stressful and you need to find emotional support from a better source for yourself, then strange men (who may not even be men) online. Hang in there. Stay away from online men. They aren't worth the trouble.