Was Beren and Luthien the first man-elf marriage

[Halbarad of the Dunedain]

Originally Posted by Ulmo

Arwen never chose to remain Elven - where did you hear this? She chose a mortal life.

A Mortal life perhaps but that does not mean she became Mortal. She died, still young, two years after an aged Aragorn dies. She wanders the woods of Lorien before lying down to die in her greif. She dies because of the bite of the mortal life, the loss of Aragorn! Most likely she lay down to die and returned to the Halls of Mandos. Not to mention where are the guidlines for half-elven choices!? Arwen had already lived for almost two thousand years before having to choose!? When exactlly do half-elven have to make their choice? Is it ever stated anywhere in Tolkiens writings? Personaly I think she made the choice before she even met Aragorn.