He isn't immune to the allure of the doppelgänger, no one is. They attract man like moth to the flame, bewitching them with the fire burning in their eyes and their hearts and their every gesture.
Petrovas are made of fire, proud and dangerous and unpredictable, and he, too, fell under their spell.
The problem is: Petrovas are selfish and love to be the center of attention and their hearts are always torn between two brothers and this story, written for the first time a millennium ago, follows always the same pattern. The girl chooses one brother and then both and then the other and everyone always looses something and living happily ever after is never an option.
He learns to beware of Petrovas women, so carefree and enchanting and doomed.
He learned his lesson. His brother didn't.
This is what he prides himself with, why he laughs at Elijah's obsession with women who have nothing of their own, who repeat always the same story.
He learned his lesson, but he's cautious when he first arrives in Mystic Falls, when he doesn't look too long in the girl's eyes.
He learned his lesson but he forget history spans in circle and always repeats itself.
Elena is a Gilbert but her heritage is painfully evident, painted on her face in the olive color of her skin and the dark ones of her long hair and the warm brown eyes.
Elena is a Petrova and as such she knows to be careful around brothers, especially when they come in pair, because they bring heartbreak and pain and fear and death.
She knows, but her treacherous heart never learns and so she fells for Stefan and tries to ignore the attraction toward Damon.
She loves Stefan, she has chosen Stefan.
She forget that before the Salvatores there were the Mikaelsons.
She forget that she loved them, once upon a time, and that they loved her, too.
History is made by men always repeating the same mistakes and fate is a capricious master that likes to play with them, mortal and immortal, that gives them a script they have to recite like actors on a stage.
Everything is already written because everything has already happened and immortality is a very long time for read always the same story.