Demi Lovato - Nightingale Lyrics Meaning

I think that this song has a similar meaning to Hold My Hand by The Fray. It is a call to someone for protection. "Will you be my nightengale?" and "You can be my sanity, bring me peace, sing me to sleep" is just a hope to have that one person (or thing) than can always bring you happiness. Sometimes life throws difficult obstacles in your path, and everyone needs a shoulder to cry on, or a therapeutic activity to keep them sane. This song is a prayer for that.