“An extremely painful part of the aftermath of infidelity is that it threatens to erase what you thought to be true — that you were loved and admired as the one and only sexual and romantic partner in someone’s life. It was you that your partner was supposed to be longing for and thinking about. It was you that you pictured them fantasizing about and being in love with. Having that foundation shaken can put you in a place to doubt that anyone loves you at all.”