I am not a confident type of person and find it hard to say what I want or need to people unless they are very close and even then it is difficult. So, I am wondering what do other people do (shy ppl please ) when they go to friends houses for dinner? I find it hard to say that I don't eat many carbs and that I CANNOT have sugar.

I feel freaky and to be honest I prefer not to eat at ppl's houses at all as when I do tell ppl they cook something just for me and I feel bad, or they keep asking if everything is ok.

What do other people do?