The English translation of “爱人” is “Lovesickness”.
In Chinese, the word “爱人” can also be translated as “Loved one” or “Loved one’s self”, but “Lovesickness” has a more specific and psychological meaning. It refers to a state of feeling sick and melancholic towards a person who is already gone, often after a break-up or loss of a relationship.
In English, “Lovesickness” can also be used to describe a feeling of sadness or nostalgia towards a person who is no longer in your life. The translation “Lovesickness” into English is a way to capture the specific and psychological meaning of the Chinese word.
In any case, the English translation of “爱人” is “Lovesickness”, which reflects the deep and universal nature of this feeling.