You gotta let her go before she'll ever come back.
Yes, it stings to watch them walk. She needs to feel the full weight of her decision. It's a jungle out there but the WAS sees freedom and happiness.
Let her go. Once she leaves, back way off. Let her feel your absence. Do not let her use you for emotional support. Don't be a dick, but get so busy that you have no time for her.
Wish her the best and let go. It's the fastest way to get her back.
