What do you think is the message of this song ?

Think about it. It's Justin Bieber. Knowing that, I highly doubt there can be any deep, hidden meaning to this song. The only "meaning" of this song is that he's telling a girl that if she goes out with him there will be one less girl who's lonely. He's also saying that he won't be like the other guys who she's gone out with who in the end have just caused her more pain and heartbreak. That's probably the deepest meaning there ever will be if there is one because Justin Bieber kind of sucks and sounds like a girl/boy who hasn't gone through puberty yet. No offense....