旧情人是我爱的人
[jiù qíng rén shì wŏ ài de rén]
In this username, the user expresses that their ex-lover was someone they deeply loved. The term “旧情人” (jiù qíng rén) literally means “former lover”, and by associating it with “the one I love”, the person is possibly conveying a lingering affection for their past relationship.