晚安晚安没你怎能心安
[wăn ān wăn ān méi nĭ zĕn néng xīn ān]
This username conveys an emotional dependency on someone for peace of mind: the meaning is akin to saying 'Goodnight, how can I rest without you?' '心安' (xīn'ān) refers to having ease or peace at heart; hence the sentiment expressed involves feeling incomplete in one’s absence.