yup...you have to realise she's just misrable. People say a lot of hurtful things when they are feeling miserable or angry or both.
Look at her like a child, children say "I hate you" to their parent sall the time, they don't mean it, they are just immature and pissed off.
Just let it slide off...its her misery talking.
Last spring I had my wife yelling "I HATE YOU I HATE YOU I HATE YOU" at me at the top of her lungs. A week later she's kissing me for the great birthday she had.