You just don't drink. You say no. The first no makes the second easier. The second makes the third. The one thing that you have to always keep in mind is that you aren't just saying no this once. You didn't "have a good week so you should celebrate". You have to say "NO, I don't drink. Ever." Abd mean it. One drink will put you right back where u are. It sucks. For a few weeks. Who fuckin cares. What were you doing for a few weeks last year? How about 10 years ago? You won't even remember those few weeks. What you WILL remember is the pride and confidence you have in yourself when you succeed. But you have to mean it. Every time. "NO, I don't drink."