"I'm having doubts about my fiance"

"I'm having doubts about my fiance"

From a female blog reader:

I was with my partner for almost five years before we did our traditional marriage last year. It was a long distance relationship because we live in different states. We always found a way to make it work but few months to the traditional marriage we started fighting a lot and having numerous misunderstandings which made me to start second guessing my decision. Issues and flaws that he had that I usually overlooked‎ became a problem for me..but I tried to look past it because I love him and I know he loves me even more. Now the main wedding is coming up this year and am still having these doubts about him.. please I need advice from people that have been in my shoes. ,am I just scared of the future or this is enough reason to opt out before its finally too late.