9Make them comfortable to talk about what underlying cause contributes to their drinking.
Very rarely do people drink simply to drink. Often they struggle with depression or anxiety, and drink as a way to self-medicate.
It is important to acknowledge that you think there may be an underlying issue that results in drinking, but try not to sound accusatory, especially if the person may not know they suffer from depression or anxiety.
Instead, ask them gently if they think there could be a contributing cause to their drinking. Feel out their response, and go from there.