You can talk about the problem. Find someone you trust who will talk to you. It could be a teacher, a friend's parent, a big brother or sister, or someone else who will listen to you. These are the 'safe people' in your life. This group has meetings, like a club, and the kids there share tips on how to make their lives easier.
Some schools have Alateen meetings on the school grounds during the day or after school.
Maybe your teacher could help you find one. Or, you could look for the phone number of Alateen in the phone book or call directory assistance and ask for the number. Alateen also has a web site you can visit. Alcoholism is a disease. People who have the disease have lost control over their drinking and are not able to stop without help.