毕竟深情不及久伴我愿久伴深情为你
[bì jìng shēn qíng bù jí jiŭ bàn wŏ yuàn jiŭ bàn shēn qíng wéi nĭ]
This expresses deep affection and commitment. 'Even deep feelings can't compare to long-term companionship; I choose to keep loving you deeply'. It signifies valuing lasting relationships over fleeting passion.