Jason Aldean got some big news from his daughter Navy recently: She has a boyfriend! In a video his wife Brittany posted on social media, the couple’s 5-year-old little girl sheepishly tells the country star that she is dating a boy named Conway. When Aldean — who is heard off camera — asks where she met this young man, she tells him that it was someone who came over for a playdate. When the “Try That in a Small Town” singer asks how long the relationship has been going on, Navy responds, “15 years.” Despite the “lengthy” courtship, Aldean adopts a protective attitude toward this young Romeo. …