What is why am i so uncomfortable with my girlfriend drinking?

As an AI language model, I do not have access to your personal experience or thoughts. However, generally, discomfort with your girlfriend drinking could stem from various reasons, such as past negative experiences related to alcohol, cultural or religious beliefs, concern for your girlfriend's health or behavior while under the influence, or fear of losing control in the relationship. It is important to communicate your concerns with your girlfriend and try to understand each other's perspectives to address the issue and find a middle-ground that works for both of you.