Low self esteem because of my out of shape body :(?

To be honest, I would listen to your fiance, stop letting those 'close' to you spoil what should be an exciting time for you. Lean on your man, he sounds supportive, tell him how you're feeling. There are many different styles of dresses that flatter any shape or size, believe me! The way you are going, it won't be your figure that will show on the photo's, it will be a tear-stained sad bride instead. Your man loves you just the way you are or he wouldn't want to marry you, right? So use that knowledge to stay positive, stay away from these 'well-meaning' people, they will end up destroying you x