Quote from : Harry Potter and the Deathly Hallows Book

He’s gone, Harry told himself. He’s gone. He had to keep thinking it as he washed and dressed, as though repetition would dull the shock of it. He’s gone and he’s not coming back. And that was the simple truth of it, Harry knew, because their protective enchantments meant that it would be impossible, once they vacated this spot, for Ron to find them again.