While I'm no scientist, I don't think the brain ever forgets the addiction.
When you don't drink that feeling goes away but is not forgotten so when you drink again the brain says hey I remember this, it made me feel good and I want to feel good!
Which isn't helpful I know! We have to use logic to overpower the strong desire
You'll be okay, it was a little mistake that you can accept happened and move on from
Good luck