If you want a little wow factor you might want to take her to (SPG) Albert Whitted airport in downtown St. Pete. The tower guys are nice and the good restaurant is right at the ramp. You can do quite a bit of sightseeing along the beaches which always keeps the ladies happy and even go for a walk in the downtown area.
SPG. Not only the for restaurant on the field but close to many others as well as a short walk to the Dali Museum. (Highly recommended)