As a vegan or vegetarian, when you go to a party or some function do expect your unusual dietary?

Being the only vegetarian in my family and circle of friends how can I expect them to cater just for me? I would never expect that. I always find something to eat, whether it's sides or I eat before hand. Actually I've been so lucky to have such a supportive family and group of friends, there are many times that have wanted to go out of their way for me... I actually feel bad about that! I don't like imposing on people or making a big deal out of it... it was my choice to change my eating habits, no one else should be affected by that.