I had basically the same problem with alcohol abuse but my mother was addicted to pills, she was doing it most of my childhood and my family just ignored it she just slept all day and night and was like this monster. She fought and swore and at me for years and my sibling. My dad got over it so he broke up with her it really got her too stop so she went to rehab and then relapsed not long after. My dad is now a happy man and my mother is a happy women she loves me and lives with regret of loosing her husband and almost her children. There are days were I think she's on drugs again but I just deal with it and think about how happy I will be one day when I moveout. It's a terrible thing no teenager should go through it, stay strong and think how happy you will be one day away from the stress, think about how you will never be like her you will be an amazing lady with a happy family.