It's a lot like the proverb:
"For want of a nail the shoe was lost.
For want of a shoe the horse was lost.
For want of a horse the rider was lost.
For want of a rider the message was lost.
For want of a message the battle was lost.
For want of a battle the kingdom was lost.
And all for the want of a horseshoe nail."
The person on the song believes that missing that bus had huge consequences.
This symbolizes that one shouldn't wait to tell someone you love them, because someone else might beat you to it: "I bought a rose, but you had a bouquet."
It's a lot like the proverb: "For want of a nail the shoe was lost. For want of a shoe the horse was lost. For want of a horse the rider was lost. For want of a rider the message was lost. For want of a message the battle was lost. For want of a battle the kingdom was lost. And all for the want of a horseshoe nail." The person on the song believes that missing that bus had huge consequences.
This symbolizes that one shouldn't wait to tell someone you love them, because someone else might beat you to it: "I bought a rose, but you had a bouquet."