Twice-divorced rocker Steven Tyler is truly a romantic at heart. Over the July Fourth weekend in Washington, DC, where he was playing a concert, the Aerosmith legend and former “American Idol” judge accidentally strolled into the wedding reception for Manhattan commercial real estate broker Jeffrey Roseman. Tyler good-naturedly posed for photos with Roseman and his bride, Shirley Ramos, and their guests. “He could not have been more gracious and accommodating,” Roseman tells The Post’s Jennifer Gould Keil. “We were convinced that were it not for his ornery bodyguard, we could have had Steven Tyler party with us all night!”