Heya Deb-
I suppose it would depend on how you wanted to 'use' the song- for instance,
Paradise By the Dashboard light goes over very well after dinner (and once people have had a glass of wine or two

)
For Crying Out Loud (in my opinion) is one of the most romantic songs of all time-but it's also quite long and personal, so it depends on your guests...and at what point in the evening your going to play this.
I would say that a nice happy medium might be
Because of you off of CHSIB(I know somebody allready suggested that one, sorry- but I think it's your best bet for a 'romantic slow dance')
What a choice!!
I hope if my boy and I EVER get married (no, 3 years isn't too long to wait for the question grrrrrr

- just kidding

) but I hope he'll expect at least A FEW Meat Loaf songs...it's just too hard to decide
Congratulations, by the way!