What is the tone of grenade by Bruno Mars?

Bruno Mars' "Grenade" is a mid-tempo pop-rock ballad. The song's lyrics tell the story of a man coming to terms with the end of a romantic relationship and expresses deep pain, longing, and desperation. Despite its title, which evokes an explosive object, the overall tone of the song is rather melancholic, reflective, and introspective as the protagonist reflects on and struggles with their unresolved emotions and attachment to their lost love.