What does it mean when a girl shows you a song?

I work at a country club in my hometown every summer, and I happen to work with a few of the girls from my school. Today my old friend had her first day here, and I showed her around the course. At one point we started listening to music, when she showed me a song, "Unforgettable" by French Montana. It was the only song pick of hers we listened to before we got back to our work station. It seemed very romantic, I was wondering if something so simple could mean anything?