I believe that this song is about an abusive relationship, and the singer, is leaving his lover for good, as if he doesn't leave for good, he'll just keep coming back. "This love has taken its toll on me, she said good bye, to many times before" And he both references how both his and heart is broken over it "and her heart is breaking in front of me" "and my heart is breaking in front of me"
I believe that this song is about an abusive relationship, and the singer, is leaving his lover for good, as if he doesn't leave for good, he'll just keep coming back. "This love has taken its toll on me, she said good bye, to many times before" And he both references how both his and heart is broken over it "and her heart is breaking in front of me" "and my heart is breaking in front of me"