Hey Mate
From a health perspective that is a great deal to be consuming, sooner or later it will take its toll especially as you stated that is a good week.
We tend to get hung up on the amount, or how long the binge is – but really it’s the impact its having on the person and the people around them, and from what you have written it sounds like its impacting your relationship significantly – and that is a problem.
The fact your concerns are being dismissed isn’t good as where do you go from there?
Do you think she sees it as a problem at all?