My  apology  to  all  those  good  old  days, because  I  didn't  know  how  to  cherish  at  that  time .

我向所有美好的旧时光道谦，因为那时不知道珍惜。

Apologizing does not always mean you are wrong & the other person is right. It just means you value your relationship more than your ego.

道歉并不总是代表我承认自己错了，只能说，我在乎我们的关系，比我自身还在乎。