The sound

This sound, it fills my ears. It's torture to me, like nails on a chalkboard. This sound is self-inflicted.

This is the sound of passion. The sound of failed attempts at love. The sound of my anguished cries.

The sound is better than silence. It lets me know i'm still alive. It lets me know i'm human, and that i still have emotion.

Can you guess what this sound is? It's the sound of my slowly beating heart.