My heart aches when I hear stories like this.
We are dealing with dementia with a family member and have dealt with it before. Get that address and go see your Mom. Who cares if she remembers you, be kind to her today and bring her some joy.
People tend to stay away from those with dementia because it's hard to see them in that state. But they still need to be loved and many times they can remember when they were a child and tell wonderful stories. The clarity they can have surrounding something from 50 years ago is amazing and many times while telling those stories you can see who they really are.
You will need to be strong and understand you can't change the past, you can't change her condition, and no matter how much you want her to remember something she may never. But even with that you can build a connection with her and at least learn a little about her life.
I am not sure you understand. My step parents messed up my my brain and my feelings and I almost killed myself because of too many lines. Being on that age, I was naive, and after one year, after all of that nightmare, I find out she is alive. The only person who knew my mum 's address was that auntie. Not long time ago I find out she run away with her 2 children in Italy, after she left her husband to die of illness and hunger in the house. I want to leave everything this way. I want to change my future, not my past
Understand what you are saying and feel for you. Wouldn't take the time otherwise.
Do some reading on the subject of trying to leave the past in the past vs dealing with it. There are great books out there from people who are much smarter then myself and have spent their lives into understanding the brain and what needs to be dealt with vs what can be ignored. You will gain a better insight into yourself and others you meet.
You are still very young and have a lifetime of potential happiness ahead of you.