只怪我把心寄错了地址
[zhĭ guài wŏ bă xīn jì cuò le dì zhĭ]
Blaming the pain in life due to the choice of trusting the wrong person. Sending their affections ('heart') or letters ('letters of love') to addresses that were not supposed to receive them. It conveys regret over misplaced love or hopes, and also hints at moving on since it’s recognized as a mistake.