I think Loni is referring to the difference between the book version and the movie version.
In the movie, the director decided that an Arwen on her way to the Grey Havens added more drama but that is not the way Tolkien had written it. In the book. Arwen's mind was made up long before Aragorn left with the Fellowship and although this pained Elrond a great deal, he knew what her choice was.
Nonetheless, your poem is a lovely tribute to the movie version. :read: