It depends - do you cook? or are you wanting to go out? Out - my pick is Simply Fondue.  It's romantic with the high back booths for privacy, and cooking and eating out of the same pot leads to feeding each other, etc.  Cooking - I always go for steak - it always pleases a man - with a Bernaise sauce, and maybe a little seafood (in the sauce or on the side).  Finish with a chocolate dessert like a Chocolate Lava Cake with vanilla sauce or ice cream. There are plenty of cooking websites that can give you great recipes.