shì / qíng / yǐ / jīng / guò / qù / le / nǐ / hé / dé / ér / kǔ / yī / zhí / fàng / zài / xīn / shàng

事情已经过去了，你何得而苦一直放在心上？

The matter is already over, why bother dwelling on it?