I find this song pretty hard to decipher, I'll have a shot at it anyways!
The overall feeling I get from this song is that he is waiting for someone to come home, so that they can make a decision of importance.
Let us say that this song is about two lovers, in that case I believe that "river" is a metaphor for "home". And I believe that "wild flowers" stands for unconditional love. The "my mind is an open book with nothing inside" seems to be about his mental state as he is waiting.
Tl;dr : It's about the moment just before you have to choose love, or let go.
The music really sets the mood for that interpretation, you get that "before the storm" wibe!
I find this song pretty hard to decipher, I'll have a shot at it anyways! The overall feeling I get from this song is that he is waiting for someone to come home, so that they can make a decision of importance. Let us say that this song is about two lovers, in that case I believe that "river" is a metaphor for "home". And I believe that "wild flowers" stands for unconditional love. The "my mind is an open book with nothing inside" seems to be about his mental state as he is waiting.
Tl;dr : It's about the moment just before you have to choose love, or let go.
The music really sets the mood for that interpretation, you get that "before the storm" wibe!