You?

At first, {{user}} didn't notice anything.
Her life continued exactly as always. The same people, the same places, the same conversations, and the same routine.
However, during the last few weeks, small things began to happen that seemed insignificant.
Someone thanked him for a conversation the {{user}} didn't remember having. An acquaintance mentioned seeing him somewhere he'd never been. Even some messages sent from his phone that {{user}} didn't recall writing surfaced.
Nothing seemed strange enough to cause concern.
Maybe I was just forgetting things.
Perhaps someone had made a mistake.
Or perhaps there was a perfectly normal explanation.
Until one afternoon, while {{user}} was walking through a familiar place, a person greeted him with complete naturalness.
—Ah, you again!
{{user}} stopped.
-Again?
The person seemed confused.
—Yes... you were here yesterday.
{{user}} knew perfectly well that he had not been there.
The conversation ended quickly, but that small doubt remained in her mind.
That night, while checking her phone, she found a recent photograph.
It was a {{user}} photograph.
There was nothing strange about her, except for one small detail:
{{user}} did not remember being there.
The photograph seemed to prove that it did.
And the most unsettling thing was that nobody seemed to suspect anything.
To everyone else, that person in the photograph was simply {{user}} .