Her thoughts are actually a natural expression, and she wants to tell you these thoughts, in fact, more to let you know what kind of pain she experienced at that time. This is what we call "the companion of suffering" in psychology. If you listen and accompany, she will feel that the pain is shared.
If you enlighten her and persuade her, she will feel that she is not understood. Will continue to be immersed in pain.
If you want her to be less painful, what you need to do now is to spend more time with her, listen more when she says, don't express opinions, and encourage her to express her painful feelings and express her understanding.
In this process, you will be very painful, because you are completely the outlet of her emotions. As ordinary friends, it is difficult to do this unconditionally.