We cross the street
You hold my hand
Afraid to let go and if I walked away
And left you there
Would you know why
You are the answer now
You don't know
You can be everything
You don't know
You won't believe it now
You don't know anymore
You are the reason and the rhyme
We walk into your room
A mirror's caught your reflection
You walk away and call to me
To fill in the frame
You are the only one
You don't know
You are the fire of love
You don't know
You can believe it now
You don't know anymore
You are the reason and the rhyme
I walk this road
You follow me
I don't know why
And if I walked away
And left you there
Would you know why?
She's singing to a lover, trying to tell him how much he means to her, and he simply cannot understand this. He sees "love" as simple companionship, while she sees him as part of her life. She is so deeply in love with him that it hurts her to think he can't understand how much she loves him.
And so - she is asking him if she should just leave.
