Hi there, welcome to our world, one that is confusing at best!
It is great that you are reaching out for help, for guidance.
This is going to be a difficult journey, at best, for you and your girlfriend. Her recovery will require her total attention, so, your relationship will have to take a back seat for now.
I would suggest that you attend Alanon meeting to better understand her disease and what you can do to not enable her.
You will have to make many decisions in the upcoming months, if you need to vent we will be here for you.