2. She knows pain
She has been there before, she knows how it can hurt like hell. And she will be hellbent to not cause anyone else the kind of pain that she has been through. She will be gentle with your heart, because she knows what it feels like to have your heart well being completely disregarded.
3. She is not going to waste your time
Her past relationships may have left her resentful for the time and efforts she so tirelessly wasted away. If she sees that a relationship isn’t right she will not let it drag on for the sake of saving your feelings. She knows that hanging on too long can be even more painful than letting go in itself.