Complex sentence: Freya is shattered, but when Fratley leaves again, she says nothing; during her search, she prepared herself for the worst, knowning that he's alive was relief enough, even if he had no memory of her.
Split into simpler sentences: Freya is shattered, but when Fratley leaves again, she says nothing. During her search, she prepared herself for the worst; knowing that he's alive was relief enough, even if he had no memory of her.