It's about being in a relationship where you're expected to be this perfect person to satisfy your lover and when they see that you're not perfect, they want to leave you. He's telling her that he's not perfect and that she shouldn't expect him to be that way because she's not perfect either.
It's about being in a relationship where you're expected to be this perfect person to satisfy your lover and when they see that you're not perfect, they want to leave you. He's telling her that he's not perfect and that she shouldn't expect him to be that way because she's not perfect either.