I can sympathise. Friends and fun are great but one can't enjoy them as much if ill. I'm already on a very restricted diet due to celiac and collagenous colitis, so avoiding alcohol, caffeine, sugar, and salt, and drinking more water is easy. I would say eat healthy, drink enough water, and enjoy yourself. It is unlikely they know what you are dealing with and impacts on your health. Great that you have been so successful on managing your health.