"sleeps with butterflies" is a figurative way of describing a girl who is used to being abandoned by the men that she love. The butterflies are the men who fly around and don't know how to stay put into one serious relationship. The girl, although she's hurting, she has accepted that fact that all the men she learns to love always takes her for granted and leaves her. Although she claims that she doesn't go after them anymore because it's the men's loss if they leave her. She strongly feels that she's the type of girl that deserves respect and taken seriously as evident in the line("but i believe i'm worth coming home to"). This is such a very nice song that almost every girl can relate to, especially if you came from a tragic relationship with a man you loved so much.