To me, this song is about letting go and deciding to love someone who isn't perfect. Like she's singing to someone who doesn't want to be with her because she's not perfect, and their relationship isn't perfect or even ideal, like a romance in the movies would be. She's saying that she's not an angel, but then no one is, and if he wants an angel then he can essentially dress her up as one.
To me, this song is about letting go and deciding to love someone who isn't perfect. Like she's singing to someone who doesn't want to be with her because she's not perfect, and their relationship isn't perfect or even ideal, like a romance in the movies would be. She's saying that she's not an angel, but then no one is, and if he wants an angel then he can essentially dress her up as one.