What exactly did the girl mean when she said that it would be difficult to calm down?

In the end, it was difficult to reconcile. This phrase often appeared in modern online novels or television dramas. It usually referred to the emotional entanglement caused by the departure or failure of a certain character. This word is usually used to describe the love or friendship between the hero and heroine. When the hero experiences setbacks, loss, or loss, they will feel uneasy. This emotion usually continues to develop and affect the protagonist's life and psychological state. To be specific, there could be different explanations for the final result. When someone leaves, we will feel lost and painful because of their departure. In some novels, it can also refer to the various setbacks and failures that the protagonist has experienced. These failures may make them feel unable to let go and unable to forget. This sentence can also be used to describe the emotional entanglement between the hero and heroine. When they lose each other or suffer betrayal, they will feel uneasy. It was a commonly used phrase to express loss and pain. It was often used to describe the psychological state of the characters in emotional stories.