This song is about how a girl is in a relationship where she gives more than she receives. She feels like her boyfriend doesn't give her all the love that she wants/deserves. She tries to ignore these problems when she thinks about it, it hurts her but she doesn't want to leave him because she loves him. So she's asking her bf to give her his whole heart and be fully dedicated to making her happy.
This song is about how a girl is in a relationship where she gives more than she receives. She feels like her boyfriend doesn't give her all the love that she wants/deserves. She tries to ignore these problems when she thinks about it, it hurts her but she doesn't want to leave him because she loves him. So she's asking her bf to give her his whole heart and be fully dedicated to making her happy.