念你不多一生则以爱你不久永远而已
[niàn nĭ bù duō yī shēng zé yĭ ài nĭ bù jiŭ yŏng yuăn ér yĭ]
Implies devotion that can be summarized as saying, if I don't think of you much then it is for a whole life; and loving you not long, only forever - a poetic expression of eternal love.