长居你心久永不离居在我心生死相依
[zhăng jū nĭ xīn jiŭ yŏng bù lí jū zài wŏ xīn shēng sĭ xiāng yī]
This username expresses deep affection and eternal love. The person wishes to be in the other's heart forever, indicating a very strong commitment to this relationship.