My sister use to be an alcoholic. Have you ever known one?
Yes, my Father. He suffered from alcohol dependence
Dealing with someone that is an alcoholic can be very hard to manage at times. Especially when the person does not want to let you get them any type of help.
It is very hard. Most times the actual person can not admit or realise that they are suffering from alcohol use disorder 
You are correct there. Trying to get the person to admit or realize they alcohol dependency just turns into a never ending argument. It is just a very stressful situation all the way around. For everyone, really.
They don't realise the medical conditions that can arise from over drink such as mental illness, cirrhosis of the liver and an increase in the risk of cancer
Exactly. My best friend died from cirrhosis of the liver caused by excessive alcohol consumption. She was only 34 years old. This is why it was so important for me to keep pushing my sister to get help.
So sorry to hear that. Cirrhosis of the liver develops slowly over months or years.