I know that at your age, you want to interact with your friends. I myself like to go out with my friends for a drink. Mine is usually a soft drink. Just because I don't do the alcohol doesn't mean I can't party. As for your question I will let those who know more answer in respect to the nephritis. When I first got sick years and years ago my doc allowed 1 drink a month.
Your best bet is to ask the doc.