"So beautiful, the space between,
A painful reminder and a terrible dream,
I’ve been here before and I’ve got time,
I’ll give you the tour, show you why I…
Walk the layout routines in the night,
Some doors have "stay out!" spraypainted in white.
While all the world’s asleep, I walk around instead,
Through the memories, down the halls of my head."

~Routines In The Night by Twenty One Pilots

This means, there's a difference between a reminder of the past and just a nightmare, a delusion of being hurt. You've experienced this before, so you will share how to cope with it. You will show another that you've done the same, and why you've done it. The halls of your mind lead to your memories, doors with stay out spray painted on the doors tell you that those are memories you don't want to remember, but the doors are white, so you remember them anyway as they're so traumatic, they just show themselves at random times. A message from me personally, put the past behind and put your best foot forward, as your future is bright and you have so much to live for. Love from your one and only, Arlecchino.