I think this song is about starting over after a breakup/heart-break. Probably got dumped and doesnt feel like he was appreciated, hence the line "I want you to know that someone has come and gone." He changed a lot during the relationship, some for the better, some for the worse. He wants to be the man he was before hand. He appreciates the experience and has learned from it, but hes tired of being miserable and wants to start fresh.
I think this song is about starting over after a breakup/heart-break. Probably got dumped and doesnt feel like he was appreciated, hence the line "I want you to know that someone has come and gone." He changed a lot during the relationship, some for the better, some for the worse. He wants to be the man he was before hand. He appreciates the experience and has learned from it, but hes tired of being miserable and wants to start fresh.