She never says it to hurt you. It can still hurt, and the distance can still grow.
Most couples don't drift apart in one big fight. It happens slowly. A tired evening, a 'not tonight', and you step back a little to protect yourself. She sees you step back, so she steps back too. Nobody decided it. Both of you just kept it going.
She may not have stopped loving you. She may have stopped feeling noticed. And you may have stopped trying because you were tired of feeling unwanted.
It usually doesn't take a big speech to start moving again. Coffee in bed. A note on the mirror. One small thing that says: 'I still see you.'
This box is one of those things. It won't fix everything, and we won't pretend it does. But it makes her stop, it gives you the words, and it can be the first small step back toward each other.