Ditto to what the others have said.
And the most peplexing, is after all of the 'sure' 'whatever' 'you decide' 'yeah that looks good' 'umm, I don't know, I'll leave it to you' comments from FH, there will be one thing that he might get all interested in and end up being stubborn on - so be prepared!
But don't worry...your guy is pretty average as far as fiance's go. Don't take it as disinterest in your marriage or wedding, they just don't seem to care as much about the detail things that we go crazy on...like how the tulle is swagged!