When does the longing end?

It’s 42 days now since I gave it up. I feel better, am more energetic and sleep better but the longing for a drink still won’t go away. I keep saying I’ll have drink at the end of the month, or at the end of this week, or on my birthday but those days come and go and I still don’t drink. I just set a new date. I do this because I know I can’t just have one drink and stop again. I will relapse so it has to be complete abstinence but the question I have is when will the longing for that single malt scotch truly disappear?