Here are my romantic suggestions:
Disneyland
Blue Bayou Restaurant
Snow White Wishing Well (night)
Pirates of the Carribean (late enough you may get your own boat)
Peter Pan
The alcoves in New Orlean Square
Tarzans Treehouse (night)
Fantasmic Dessert Buffet
Splash Mountain (I know this does not sound romantic but you sit one in front of another and you can snuggle up tight)
Movie Cinema on Main Street
Fireworks
Any dark ride
DCA
Sunwheel (Night)
Avalon Cove (I have not tried it but hear great things)
The redwood log in Redwood Creek Challenge Trail
Disney Animation Building
Disney Resorts
Waterfalls at Disneyland Hotel
Grand Californian Lobby in front of the fireplace
in the rocking chairs
Napa Rose
That is it for now - I will keep on thinking