何必去想那个不爱你的人
[hé bì qù xiăng nèi gè bù ài nĭ de rén]
'何必去想那个不爱你的人' means 'why should you think of the one who doesn't love you?' suggesting a counsel to not dwell on unreciprocated affection and perhaps letting go of someone who does not return one's feelings.