Aww no probz. And I understand what you mean but really its not your business or fault that the guy cant get over this. Leave him to it. The more you dwell on him the more you’ll fall into the horrible pit of depression because you’ll always have doubts. If hes miserable then why let him make you and your future hubby miserable too? don’t let him have such a hold over you.
Juat completely cut him out of you life and focus 100% on your loving fiance. You have a bright and happy future ahead of you.