How about a late romantic dinner in EPCOT at the Bistro in France, watching Illuminations from your table and a lazy walk out the international gateway over to the Boardwalk for some fun at Atlantic Dance or Jellyrolls or even out on the Boardwalk?
Or maybe you would prefer massages at one of the Spas?
See the Cirque De Soliel show, LaNouba?
Or a night of fun at Pleasure Island?
You have so many choices, depending on what you both like to do....