I wondered if "bite the hand that feeds you" was a reference to him, i.e. he tells her she's beautiful but she can't believe him- because of her belief in magazines etc as everyone else said- and has a go at him. "Safety pins holding up the things that make you mine" seems to imply their relationship has an unstable base, her obsession that she's not good enough is damaging it and she should just "shine on" and let it go
I wondered if "bite the hand that feeds you" was a reference to him, i.e. he tells her she's beautiful but she can't believe him- because of her belief in magazines etc as everyone else said- and has a go at him. "Safety pins holding up the things that make you mine" seems to imply their relationship has an unstable base, her obsession that she's not good enough is damaging it and she should just "shine on" and let it go