You need to stay confident and keep her off a mental pedestal (she is lucky to be spending time with you, not the other way around). You can certainly get a buzz without getting "whisky dick" and encourage it if you will loosen up and become more comfortable and confident by doing so. You need to keep the conversation lightly/playfully sexual and keep in mind her body language. Talk closely and touch her whenever possible, pay attention to the way she responds and act accordingly. Always best to use gut instinct, try not to second guess yourself, stay confident, funny and don't be afraid of rejection.