Hi Jodey!
I'd suggest telling him you're going for the elegant/sleek look rather than princess.
I'm probably in the other direction - FI wants to go very casual... even mentioned wearing (tailored) shorts to the wedding.
He keeps showing me pictures of plain, white cotton dresses.
Um. Hello? I'm getting married here?? I will look like a bride, and he will like it (or deal).
I tried explaining to him last night that its a wedding, and even if we tell people its casual, if I wear a plain white dress, guests are going to be dressed better than I am. LOL!