If your girlfriend says let's pop into the store to buy some food and they sell alcohol in that store, do you start berating her for "not doing her research"? You have a problem with drinking. If you don't drink the stuff, it's not going to affect you. It may be sitting close to you, in a bottle behind the bar or on the counter of a store, but it can't get you drunk unless you buy it and pour it down your throat.
That's the great value of having a plan to stay sober. But it's down to you, not your GF to sort it out.