You're on the phone with your girlfriend
The song begins by setting the scene. The boy the singer is interested in is on the phone with his girlfriend, who is upset about something he said.

She's upset
The singer describes the girlfriend as upset, implying that the reason he may be interested in her instead is because she's difficult to deal with.

She's going off about something that you said
The girlfriend is ranting to the boy about something he said, showing that he can't communicate with her as well as he can with the singer.

'Cause she doesn't get your humor like I do
The reason the girlfriend is upset is because she doesn't understand the boy's humor, which the singer sees as a sign they're not well-suited.

I'm in my room
The singer sets the scene of where she is, indicating that she's not with the boy or the girlfriend.

It's a typical Tuesday night
The specific day of the week is given, indicating the mundane nature of the singer's life without the boy.

I'm listening to the kind of music she doesn't like
The singer is purposefully listening to something she knows the boy's girlfriend doesn't like, indicating her efforts to connect with him by sharing his interests.

And she'll never know your story like I do
The singer implies she knows more about the boy's life and background than the girlfriend does, showing her level of interest and commitment to him.

But she wears short skirts
The singer begins to contrast herself with the girlfriend, noting that she dresses more modestly.

I wear T-shirts
The singer describes herself as wearing more casual clothing, standing in direct contrast to the girlfriend who wears short skirts and other more 'girly' clothes.

She's cheer captain
The girlfriend is revealed to be a cheer captain, which can be seen as a stereotype of popularity and attractiveness.

And I'm on the bleachers
The singer positions herself as someone who is observing from a distance, standing on the sidelines rather than being part of the action.

Dreaming about the day when you wake up
The singer is dreaming of a future where the boy realizes that his girlfriend isn't right for him and chooses the singer instead.

And find that what you're looking for has been here the whole time
The singer implies that the boy has been looking for a connection and companionship with someone who shares his passions and interests, which the girlfriend cannot provide.

If you can see I'm the one who understands you
The singer is asking the boy to consider how much she understands him and his interests, in contrast to the girlfriend who doesn't understand or appreciate them.

Been here all along so why can't you see
The singer is highlighting the fact that she's been around for a while and has been making an effort to connect with the boy, yet he still hasn't noticed or acknowledged her feelings.

Walkin' the streets with you and your worn-out jeans
The singer describes a scene where she and the boy are walking together, and she's noticing his physical appearance and attire.

I can't help thinking this is how it ought to be
The singer is expressing her desire for things to be different between her and the boy and is highlighting their connection and shared interests.

Laughing on a park bench, thinking to myself
The singer describes a scene where she and the boy are together, sharing a moment and having fun together.

Hey isn't this easy
The singer is emphasizing how comfortable and natural it feels to be with the boy, in contrast to situations with his girlfriend.

And you've got a smile that could light up this whole town
The singer is complimenting the boy's smile and describing it as something particularly special and noteworthy.

I haven't seen it in a while since she brought you down
The singer is acknowledging that the boy's girlfriend has changed him and made him unhappy in some way.

You say your fine
The boy is telling the singer he's fine, but she knows he's not truly happy in his relationship.

I know you better then that
The singer feels like she knows the boy well enough to see through his claims of being fine and recognize his true emotions.

Hey what you doing with a girl like that
The singer is questioning why a boy like him would be with a girl who doesn't fully appreciate or understand him when he could be with someone like her instead.

She wears high heels
The singer describes the girlfriend wearing high heels, further emphasizing the contrast between her own more casual style and the girlfriend's dressing up.

I wear sneakers
The singer reiterates that she wears sneakers, further highlighting her casual, unassuming style.

Standing by and waiting at your back door
The singer is waiting for the boy, perhaps indicating a level of dedication and desperation.

All this time how could you not know
The singer is surprised that the boy hasn't realized that he belongs with her, given how much effort she's put into showing him that they're a good match.

Baby, you belong with me
The singer is stating plainly that she believes the boy should be with her, emphasizing that she's a better fit for him than his current girlfriend.

Oh, I remember you drivin' to my house in the middle of the night
The singer recalls a specific moment where the boy came to her for support or comfort, highlighting their connection and his trust in her.

I'm the one who makes you laugh
The singer is emphasizing that she has a particular talent for making the boy smile and feel happy.

When you know you're about to cry
The boy seems to rely on the singer as a confidante, showing that they have a deeper connection than just a casual fling.

And I know your favorite songs
The singer is showing her level of interest and commitment to the boy, indicating that she knows details about his life and habits that the girlfriend doesn't.

And you tell me about your dreams
The boy confides in the singer about his personal goals and aspirations, indicating a level of trust and respect between them.

I think I know where you belong
The singer is expressing confidence in her understanding of what the boy needs and where he would be happiest.

Can't you see that I'm the one who understands you
The singer is asking the boy to recognize how much she gets him and his interests and how valuable that is compared to his girlfriend.

Been here all along so why can't you see
The singer is emphasizing that she's always been there for the boy and has been making efforts to connect with him, yet he's still not recognizing their connection.

Have you ever thought just maybe
The singer is challenging the boy to consider the possibility that he might be happier with her than with his current girlfriend.

You belong with me
The song ends with the repetition of the chorus, emphasizing that the singer believes the boy is meant to be with her and that she's the better choice than his current girlfriend.