What horrible thing did they say to you that lives/lived rent free in your head?

With mine it was this, during a fight when we were still together — “Nobody ever loves you. It’s a problem with you. Why does no one ever love you but so many girls are always falling in love with me?”

He truly had me convinced i was not only unworthy of desire (that’s a whole other can of worms) but of romantic love too, even for years after the breakup.