What is the meaning of the song concrete girl by switchfoot?

Answer 1

After doing some looking over the lyrics and doing some thinking, this is what I think Concrete Girl means.

I think it's a man reassuring a girl that she is strong, even if she doesn't know it sometimes. Hence, the name Concrete Girl.

To me, this song is about a girl who tries to be really strong all the time (Concrete). The song says "concrete girl don't fall over in this concrete world". Think about it. What happens when a concrete hits concrete? It breaks. They are saying that being too strong only means you'll fall even harder.