An old friend of mine of almost two decades was moving to my city and needed a place to crash last night before his accommodation was ready. My fiance seemed a bit iffy about it, but I know he's a private person and thought it was just that.

This morning he erupted. He didn't sleep, doesn't want to go to work and leave me with him. He stormed out. Now this distrust of me around other men was an issue at the beginning of our relationship, but I genuinely thought we had moved past this. To me it's no big issue having a trusted friend stay over. But to my fiance it is.

How can I fix this?