I believe the meaning is much more simple...
Dancing is like a metaphor... or maybe for the singer it's literally dancing, but 'dancing', I believe, is what makes us free, confortable, is what makes us who we are.
She's shy and has troubles getting the message across so she does what she does best, she dances, hoping that he will understand the message. She's telling him to look for the message, "it's written in the dust/air/sand."
Saying she was a dancer "all along", probably means she had tried various other methods to express until she finally found dancing.
In "Words can never make up for what you do", she's alluding once again to her lack of expressivenes (if that's even a word). She feels so strongly, words cannot say what she feels, so she dances, and hopes to convey that beautiful message; cause really, once you find what your 'dancing' is, everything seems so much easier.
I believe the meaning is much more simple... Dancing is like a metaphor... or maybe for the singer it's literally dancing, but 'dancing', I believe, is what makes us free, confortable, is what makes us who we are. She's shy and has troubles getting the message across so she does what she does best, she dances, hoping that he will understand the message. She's telling him to look for the message, "it's written in the dust/air/sand." Saying she was a dancer "all along", probably means she had tried various other methods to express until she finally found dancing. In "Words can never make up for what you do", she's alluding once again to her lack of expressivenes (if that's even a word). She feels so strongly, words cannot say what she feels, so she dances, and hopes to convey that beautiful message; cause really, once you find what your 'dancing' is, everything seems so much easier.