I am very sorry you are being reminded of something you wish you could forget right now.
It is not unusual to not want to go to a reunion because one doesn't want to be reminded of a very challenging time in their life either. I have things I "avoid" as well and would rather not be reminded of either, it's really normal, you don't have to ever be around that situation again if you don't want to either, that is not a part of your life now, not important, you did move on with your life anyway which is good, that is what you need to remind yourself and be self caring, that is all that is important.

((Hugs)))
OE