多谢你的死心让我学会绝情
[duō xiè nĭ de sĭ xīn ràng wŏ xué huì jué qíng]
Translates to 'Thank you for giving up on me; it taught me how to be heartless.' This expresses a sense of coldness or indifference resulting from hurtful experiences and the resultant personal growth into not caring