我的心托你保管我的爱由你珍藏
[wŏ de xīn tuō nĭ băo guăn wŏ de ài yóu nĭ zhēn zàng]
This translates to 'I Entrust My Heart to You and Treasure My Love With You'. It expresses deep trust and emotional commitment, suggesting the user is deeply in love with someone special.