多谢你提醒是我太自作多情
[duō xiè nĭ tí xĭng shì wŏ tài zì zuò duō qíng]
'Thanks for reminding me that it was my presumption all along.' This indicates a situation where one's own hopeful assumptions about someone's affection were not true, and thus, they are acknowledging their own misunderstanding, carrying a tone of self-deprecation and slight regret.