If time could go back twelve years, a seven-year-old child would tell her mother, don't leave.
If time could go back to six years ago, the 13-year-old middle school daughter would tell her mother that I am very happy to live together again.
If time could go back four years ago, a fifteen-year-old rebellious girl would say "I love you" to a menopausal lady.
If time could go back to two years ago, the seventeen-year-old me would definitely hold your hand and tell you not to leave that day.
Because you failed to do these things, your departure will become a pity.