毕竟你不懂我心殇阿
[bì jìng nĭ bù dŏng wŏ xīn shāng ā]
This can be translated as 'after all, you don't understand my sorrow/wound.' Heart pain can only be felt and understood by the one who bears it. This implies that it would probably be useless trying to get help from others if no empathy can be reached.