You're right. The relationship IS simple. Actually, it's not even a relationship, he just likes her and wants to dedicate this song to her. That and the fact that we're 13 makes it a bit hard for him to write a good song about a relationship. As long as he wants us to keep this topic, I don't know where we can go.
http://www.musicbanter.com/images/smilies/jailed.gif
Can you think of any way to make it longer without using cliches?