Did Arwen know?

[Angry Brandybuck]

That's the great thing about Tolkein's works - it's either love at first sight or it wasn't meant to be and everyone knows it

I read somewhere, but I can't remember where, that who an elf loves is predetermined in a way. There is only ever one person they will love and they know that person when they see them. I don't know know accurate my memory is.

I just remembered, though, that Finwe's first wife died and he remarried, something which couldn't happen if the above was true, hmmm...