This can be really difficult. For those that are willing to try to understand your disease, G-PACT provides printed information that explains gastroparesis and chronic intestinal pseudo-obstruction. You can receive copies of these pamphlets by writing to Carol Pasinkoff at firstname.lastname@example.org.
Many people will understand your issues if you can relate them to something others can understand. You can compare your symptoms to morning sickness or the stomach flu that never goes away and lasts all day, every day.
Some people are just never going to get it, no matter how hard you try to explain. It is difficult for people, in this day and age, to accept that there is a disease without a cure or even good treatment options.
At social events try to bring food or liquids that you can tolerate. Enjoy the people you are with, join in on conversations. Help the hostess. Keep busy and do not focus on the fact that everyone is eating.