The concept of you is simple. Even if you died tomorrow, you happened.
You existed.
You are a concept that the laws of the universe allowed to materialize.
All the beauty that is you is cemented into the fabric of reality. You will die, everyone that knew you will die, humanity will die, the earth will die, the sun will die, the universe will die.
But no amount of time will negate the fact that your life was real.