It's definitely a less than optimal situation. However, don't blame yourself for what happened. People make mistakes when they are drunk, and mistakes regarding sex tend to be some of the most common. Instead, use it as a lesson to know your limits when it comes to drinking, and to keep yourself out of situations that could compromise what it is you really want. In addition, virginity is in the heart of the beholder. While physically you may have lost your virginity, you haven't yet shared that experience with someone you love. In that way, you are still a virgin. This doesn't have to change your belief in what you want or your self-worth.