It should have taken a huge chunk out of him, and it is incredibly sad that the writers went, "Oh, it's just Edward, he'll understand that things have changed and we'll just hook him up with Robert's ex-fiance now that she's free, too, and not delve into what he would really be feeling after this--completely heartbroken."

Yet nothing can to nothing fall,
Nor any place be empty quite;
Therefore I think my breast hath all
Those pieces still, though they be not unite;
And now, as broken glasses show
A hundred lesser faces, so
My rags of heart can like, wish, and adore,
But after one such love, can love no more.
~John Donne, "The Broken Heart"