"What Hurts the Most" is a song by Rascal Flatts, an American country music group. The song was released as the first single from their album "Me and My Gang" in 2006. The lyrics describe the pain of losing someone and the regret of not expressing ones feelings to them. The chorus goes:
"What hurts the most Is being so close And having so much to say And watching you walk away And never knowing What could have been And not seeing that loving you Is what I was trying to do"
The song has been covered by several other artists and has become a popular ballad across different genres.