Alicia,Please know your mother has a disease. Might sound scary, but look at it as a dis-ease. Dis Ease. Her problems with drinking have nothing to do you. Again, you are not the reason she drinks. She has a problem and it would be even more unfortunate if you somehow view her actions, or lack of them, as something to do with you. Your mother is dependent on a substance. She needs professional help, but someone her age needs to want the help. You can join a support group of others like yourself, who have relatives with alcohol problems. I would recommend talking with your guidance counselors at school. Be honest and share everything. They will be able to help and you can trust them.
I pray the Lord watches over you and your sister and guides your mother back to to the light. God bless you.*