I have the same "problem" in reverse. Among my group of friends, I'm the one who tends to drink the least alcohol. Sometimes, I just don't want to have an alcoholic beverage, no particular reason. My close friends understand and have always accepted it. We do laugh a bit when everyone orders a glass of wine and I ask for pineapple juice. I don't mind if they drink, and they don't mind if I don't. But some people seem to think that refusing to drink means being uptight, sick, or whatever. Like "What's wrong ?" or "Oh, come on ! Loosen up a bit, we're here to have fun !". I don't judge them for having a drink, so I get frustrated when they judge me for not wanting one. I've had to explain several times that I'm not holding back or resisting temptation to drink. I genuinely don't want to, and I'll have just as much fun as everyone else with my water/juice/soda. People can get very critical when it comes to choosing to drink or not, when they're not any reason to in my opinion.