Moving to southeastern Oklahoma, and I'll admit I'm a little biased about this next suggestion because it's right outside of my hometown of McAlester, but Krebs' Little Italy features numerous first-rate Italian restaurants, from Roseanna's and Isle of Capri to Pete's Place. If you drive just a little further to the southeast, you can enjoy an incredible stay at Beavers Bend State Park.
Moving to southwestern Oklahoma, the Wichita Mountains Wildlife Refuge in Lawton will do the trick for nature lovers. A visit to Medicine Park will top of the evening with a pleasant stroll through the various shops and dinner at the Old Plantation Restaurant.
In northwestern Oklahoma, stop in at the Hoot Owl Ranch in Kenton; in the Guymon area, see a movie the fun, old fashioned way at the Corral Drive-In and finish up the evening at the Urban Bru Cafe.
Take a moment, do a little research on Travelok.com and surprise your loved one with a “there is no special occasion, I'm just taking you out because I love you” kind of date.