What is when she says you deserve better?

When someone says "you deserve better," they are typically indicating that they believe you are in a situation or relationship that is not serving you well, and that you should seek or expect something that is more beneficial or fulfilling for you. It could be related to a romantic relationship, friendship, career, or any area of life where they perceive that you are settling for less than what you are capable of or what you truly want. It can be a way of expressing concern or care for your well-being, and encouraging you to make positive changes or choices in your life.