You are the surprise! It's all in how you package and deliver yourself. (I don't mean this in a lewd way at all, unless that's what you want. But give him your time, love, and attention. Show him how much you adore him. From that, choose the setting, the gift, the time, the action. Be the director and screen writer.)
An old fashioned picnic basket, a bottle of chilled white wine, linen napkins, silver, china, and wine glasses, and a book of poetry...a blanket and a nice quiet park with a big shade tree. I'm a guy, and THAT would just be the most romantic thing ever!