Co-dependency traits and behaviours comes to mind as something you may be interested in exploring both for you and your gf.
There are forums here Friends and Families which deal in depth with living or otherwise sharing a relationship with an alcoholic sober and / or drunk.
Best advice I can give you right now, without knowing details, is forgive yourself and forgive her for any past difficulties. Otherwise the past can destroy any chance of a future together. Tolerance and courage will be needed to carry on forward. Sometimes, seperation is required for both individuals to move forward with all honesty.
All the best, for you and her.