Orlando is close to Six Flags and Disney World (MGM, Epcot, Animal Kingdom and the Magic Kingdom). Smaller amusement parks offer activities like cart racing or mini golf. These smaller parks are scattered around the city, so research which are closest to you. Check for discounted days if you are going to one of the bigger parks, as they can get pricey. Also, if you go during the week, you are less likely to run into crowds.
Watch an exciting game at a nearby sporting event. Orlando Magic is the professional team in Orlando, which plays for over half the year, giving you plenty of chances to schedule a date to see them. Also, rodeos take place both in Orlando and on the outskirts of the city, so if you and your date will enjoy some bull riding action. Couple a sporting event with lunch or dinner at a nearby restaurant.
Pleasure Island is a part of Downtown Disney that offers everything to create the perfect date. Live music, a festive, young crowd, and restaurants and bars give you many options for how to spend an evening together. Watch a band that you both like. While you are walking to see the band, stop and share a dessert at one of the restaurants that line the walkways. Then, make your way down to Pleasure Island and listen to live music while sharing a glass of wine.
Take your date on an unforgettable adventure. Go to Discovery Cove, a part of Seaworld Orlando. Here you learn to dive and get a chance to swim with the dolphins. It is in an open water environment, so you feel like you are swimming in the ocean, rather than in a tank.