The speaker is mourning someone close, most likely a loved one who has died, though the poem never says so outright. What hurts most is everything that went unsaid. The speaker keeps replaying the person's voice but worries that the memory is slipping away, along with the smile and the presence that went with it. Then a simple "remember when" brings it all back: a nine-year-old dancing in a kitchen, happy and unaware of what was coming.
The mood turns from tender to bitter. The speaker once believed life would spare them pain, and now admits that was naive. The lesson they take is to avoid getting too attached and to live without regrets, yet they immediately undercut it by admitting they regret a great deal. The last line, "and i'm not even dead," is blunt and a little sad. It suggests that regret can weigh on someone who is still alive, and it leaves the poem with a raw, unfinished feeling.