How invested in you and the relationship with you if she keeps throwing you away and dumping you. I think if she has done this more than twice I wouldn't let a third time happen and I would leave and she can find someone else to mess and play mind games with.
“Accept — then act. Whatever the present moment contains, accept it as if you had chosen it. Always work with it, not against it. Make it your friend and ally, not your enemy. This will miraculously transform your whole life.”
― Eckhart Tolle