The advice to save your marriage is counterintuitive. Let her go.
DO NOT MOVE OUT OF THE HOUSE DO NOT MOVE OUT OF THE MASTER BEDROOM If she wants to move then you can not stop her.
She is asking for SPACE, give it to her. Get out and GAL. DETACH. Believe none of what she says and half of what she does. Have NO EXPECTATIONS. Take care of yourself, breathe, eat, sleep, exercise.
You are on moderation right now on the forum. SO post in small frequent posts until you get off of it.