Article continues below advertisementKeith Urban may have been dropping hints about his marriage troubles before his split from Nicole Kidman.About six months prior to the pair's divorce, the 57-year-old country star opened up about how life on the road had taken a toll on his personal life.Article continues below advertisementSource: MEGAKeith Urban admitted his music career caused 'relationship sacrifices.'Article continues below advertisement"It's not a job. It's, it's my life. Yeah, it's just got to be your purpose," Urban told an outlet, as he talked about his passion for music.