I am still having trouble with my family too, I think it is quite normal though because they don't know enough about going veggie. My mom still makes comments like "Well we arent eating tofu for Thanksgiving so I guess I will have to have dinner at my house." And for Easter today, she tells me to bring tofu lol for me to eat. I guess I am just used to it by now. They will eventually get used to the idea, but I agree educate yourself as much as you can so you can answer all the questions they might have about your lifestyle change
Good luck