Can someone tell me the meaning behind Good Charlotte - Like it her birthday?

Ok for those of you who haven't here the song here a link to it

http://www.youtube.com/watch?v=zANmjC2ufu0

I just want to know what is the message or the meaning behind this song and the best answer will get 10 points.

?2010-10-14T02:26:35Z

Favorite Answer

It seems to me he thinks shes cheating

Now I'm not saying that she's cheating,
But seeing is believing,




And then he guesses she's not and that he's the only one she likes

Now I know I'm one and only,
So I might as well enjoy the ride.



And the rest is just a bit gibberish to me