self-explanatory. the character that's speaking from a first-person standpoint is in-love with a girl who has obtained unrealistic expectations from the media's portrayl of modern romance ("the stories you read but never write"), he's gently urging her to let their relationship take its own course and to not be disapointed by its imperfection ("you've gotta learn to give and wait your turn"). he believes the relationship will last if the girl can learn to take it for what it is (the sidewalk chalk metaphor).
self-explanatory. the character that's speaking from a first-person standpoint is in-love with a girl who has obtained unrealistic expectations from the media's portrayl of modern romance ("the stories you read but never write"), he's gently urging her to let their relationship take its own course and to not be disapointed by its imperfection ("you've gotta learn to give and wait your turn"). he believes the relationship will last if the girl can learn to take it for what it is (the sidewalk chalk metaphor).