不是你离开我会死啊不是你喜欢我会疯啊
[bù shì nĭ lí kāi wŏ huì sĭ a bù shì nĭ xĭ huān wŏ huì fēng a]
Translating loosely to 'it's not like I would die if you leave me; it's not like I would go crazy because you like me', this expresses an attempt at nonchalance or feigned indifference towards someone's actions and potential impacts on oneself.