Closure? Does it Exist?

So- something I was thinking about the other day…is there REALLY such a thing as closure?
 
I mean sure- sometimes we do wind up getting out everything we need to say. But then we replay it in our heads and wonder- did I say it right? Do you think they got it? Should I have said more? And then there’s still those thoughts in the back of your head. Or in other cases…when you FINALLY get to hear those words that you’ve thought you’ve been waiting to hear for so long…”I messed up”, “I miss you”, “My biggest mistake was losing you and I know that now”, “I want to prove to you that I’m different”, “I was such an idiot and you were the best thing that was in my life”, etc. Is THAT even closure? Cause then you’re left thinking- is there a reason I ran into them? Can people change? Was I wrong in closing that chapter forever? Should I give it one more chance?” etc. and that’s not closure either.
 
The definition of closure is:  “closing: approaching a particular destination; a coming closer; a narrowing of a gap; "the ship’s rapid rate of closing gave them little time to …
 
So even the definition suggests that it’s not “over”… it’s “approaching” being over and it’s “narrowing” – but it’s still not definitive.
 
Sure- there are situations that we can walk away from and there are conversations where we can look back and say “yes- I said what I needed to say or heard what I needed to hear” and move on with our heads held high. But for some reason, we always look back. Or randomly think of the person, or the event. Whether we think of it in a good light, a bad light, or a sad light- the fact remains- we think about it.  At least I do. And that’s something I’m struggling with right now. I know that in the end instincts are instincts- and what’s meant to be will be. But that doesn’t make it any easier.
 
Just something to think about.