Henry Mancini,
Love Theme from Romeo and Juliet.
I like that it's an instrumental, but has choral vocals, and it's really pretty.
It's calming, and soft, and I really like it.
I don't mind that it's playing over and over in my head, it's comforting to me.
Here's a Youtube link, since it's okay to post those.
http://www.youtube.com/watch?v=UaA2WiyqO1E