我不是薄荷为何感到心凉
[wŏ bù shì bó hé wéi hé găn dào xīn liáng]
The phrase literally means 'I am not mint, why do I feel a coldness of heart.' Mint tastes refreshing yet cool, symbolizing the chill feeling here is more likely caused by certain things or person than by myself. The netizen may refer some disappointment in real life.