The worse truth is better than a lie. Why it is so hard to tell the truth? I don't understand people who lie and complicate their lives with it. How can you lie to people you love and they love you? If you're an adult and you take responsibilities for yourself, you just go out there and tell the truth. Sooner - better. It's not: to drink or not to drink. It's: to tell the truth, be an adult responsible person or to hide like a little girl.
I wish you a wonderful wedding and all the happiness after it ;-)