Originally Posted by
GirlGoneBad 
I understand that, and I intend on avoiding a lot of drinking related engagements, but it's sometimes unavoidable. For example, my fiancé is graduating in a few weeks and there will be a dinner and of course, drinking. I have to go and support him in his graduation. It's honestly impossible to avoid alcohol completely. I just want to be able to say, "I'm fine with a Diet Coke."
In most situations you don't need to say anything. The only person who obsesses bout whether you are drinking alcohol or not is you ( not you personally, but you as in the alcoholic ). Honestly no one else really cares or even notices. If you really start looking around at a graduation party for instance, you will notice that most people aren't spending their time hanging out by the beer cooler - just a few are. Everyone else is enjoying the company of others and may or may not be drinking, but none of them even think twice about it.