The other man

I’ve had a long relationship with my fiancé for 6 years. We have 3 children and he is a wonderful father. He isn’t always the best partner though.

During a rough patch and a break, I got talking to another guy. We clicked instantly and he made his intentions clear - he wanted to be with me.

I decided that if I was going to give anyone a chance it should be my fiancé as he was desperate by this point to salvage anything we had left and rebuild. So, the other guy got knocked back and life went on with my partner.

I have always thought about the other guy since. Wondered what my life would be like or what we would be doing now... does this mean I don’t love my fiancé? I’m totally in love with him being the father of my children, I’m totally devoted to him as a person and I care deeply for his wellbeing but I’m questioning our fit as a romantic couple... this other guy is always to the back of my mind.

What should I do?