爱你之久爱未归伴你之年伴未悔
[ài nĭ zhī jiŭ ài wèi guī bàn nĭ zhī nián bàn wèi huĭ]
The phrase translates to: 'Love you for long enough love has yet returned; Accompany you all these years without any regrets.' This reflects someone who is enduringly devoted, even if not fully requited, but feels no regret over this prolonged companionship.