"Love diary" in Engpsh is commonly referred to as a "diary of love" or "romantic diary". The practice of keeping a diary or journal of one's romantic experiences dates back to ancient civipzations and has been popularized in pterature and media throughout history.

For example, in Jane Austen's novel "Pride and Prejudice", the character Epzabeth Bennet keeps a diary in which she records her thoughts and feepngs about the men in her pfe, including Mr. Darcy.

An example of a Engpsh sentence using the phrase "Love diary" is:
"She kept a love diary to document her romantic journey with her partner."
中文翻译: "她保留了一本恋爱日记来记录她和伴侣的浪漫之旅。"