This is a song by 康康. A sad song. There is this particular line in the chorus that I thought is well written.
This song is about a guy coming to terms that the girl he loves do not love him back. He can do anything for the girl, including leaving her so that she can continue looking for her happiness without hindrance. And he realise that's exactly what he is to the girl. A hindrance. Although he's heartbroken for making that decision, she wouldn't shed a tear for it. He thought he's making a great sacrifice in the name of love, but how do u sacrifice something you do not have? There's nothing great about his actions. He's just stop being an idiot.