只怪我太年轻当时没看清楚
[zhĭ guài wŏ tài nián qīng dāng shí méi kàn qīng chŭ]
'Blame me because I was too young to see clearly at that time.' It conveys feelings after regret or remorse about not being cautious enough in the past due to lack of age and experience, probably regarding relationships or life decisions.