What you like to do, TG? Eat, drink, dance, tour museums, shop for clothes/cars/bikes/shoes/kitchen ware, get massages & facials, people watch, eat ice cream?
My Plano friends say Downtown Plano can be fun, but I usually stick to Dallas, lol. Dinner at Urban Crust & drinks at the Ice Bar are popular date nights. Brix has music on the weekends and is a laid back atmosphere with a decent beer selection. A little driving down the Tollway will get you to Whiskey Cakes which is a restaurant I adore - fantastic food with some local ingredients, interesting cocktails, and a divine whiskey cake for dessert. It's a tad pricy, but showing off is what Plano is all about ;)