exististe
-you existed
The word exististe is the preterite form of existir in the second person singular. There are other translations for this conjugation.
See the full existir conjugation

existir

Me prometiste que sería como que nunca exististe.
You promised it would be as if you never existed.
Ella nunca tendrá pesadillas y ella nunca sabrá que incluso exististe.
She'll never have nightmares and she'll never even know that you existed.
Es como si hasta que los viste, nunca existieron y nunca exististe para ellos.
It's like until you saw them, they never existed, and you never existed to them.
Es como si hasta que los viste, nunca existieron, y nunca exististe para ellos.
It's like until you saw them, they never existed, And you never existed to them.
Incluso si sufro, no fingiré que nunca exististe.
Even if I will be in pain, I won't treat you as though you don't exist.
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