Should I show her the song?

I confessed my love to a girl about a year and a half ago and got shot down. We are still friends but don’t really ever talk anymore. I thought I’ve been it over it for some time but recently I had a dream about her and it left me devastated when I woke up. It rehashed some of the feelings I had so I wrote a song about her. Now the song haunts me like a weight I have to get off my chest. It really hurts and I don’t know if showing her or someone else would help or just make it worse. Any advice please?