他的身边从没有过我的存在
[tā de shēn biān cóng méi yŏu guò wŏ de cún zài]
It means 'I've never been in his world'. It shows the pain of loving or adoring someone secretly and realizing you’ve always been unimportant or unseen in their world. A strong sense of invisibility and unreciprocated feelings.