Fun though it can be, alcohol is a depressant. As you know, used wrongly, it can harm your health as well as lead to dependency.
Many people have a drink as soon as they get home, or after putting the children to bed. No harm in that. But the interesting question is whether the important thing is the alcohol, the transition from work to home, or the chance to relax with your other half.
If you truly cannot face the rest of the day without alcohol, then this should ring alarm bells. If it is symbolic, a change of clothes may get rid of the working day, or share some high quality chocolate with a loved one.
Just a thought.