要走的话跟我说我送你
[yào zŏu de huà gēn wŏ shuō wŏ sòng nĭ]
This can be translated as 'If you're leaving, tell me and I'll see you off'. In essence, it signifies farewell with care and respect. Even if there's sadness and reluctance to part ways, it emphasizes wanting to be polite, mature, and showing proper respect when someone decides to leave.