I'm going to tell an alcoholic that she has a drinking problem
Why do you want to tell this alcoholic this?
Because she's wasting her life, her money, and her youth on alcohol
It's good that you are willing to help someone who has a problem.  You should try as best you can, but remember that you can't force people to get help for their addictions.  They have to be willing to take the first step.
You are so close minded. If a person is drinking too much, she should be told to stop.
Pushing them to quit might be seen as being obnoxious. They are still free to do as they want, but if you give them a gentle push and show genuine concern, they'll be more likely to listen to you.