Being a vegetarian guest at meat parties !

I am a vegetarian..
But, you see, I am such a nice person, people can't help trying to make friends with me (giggles uneasily !)..

I get invited to dinner parties, barbeque parties and what not ..yeah, the birthday parties.

I have to reiterate, I am not an antisocial person.

But, but, i don't eat meat, and i don't drink and i hate smoking.hmmmmm..
I hate looking at wasted people making a fool of themselves, and i don't want to be part of a dinner where someone already bled and killed and slaughtered an animal and is eating it with relish...

 What do i do?

Each time i get invited, i end up making an excuse as to why i can't come or how i won't be able to make it...hmmmmm..
.now...i don't want to mention the actual reason why i don't want to dine with them" the reason that i am a vegetarian teetotaller "
because
 i don't care to involve in arguments about the food chain and carnivores and other such stuff..
seriously..I don't care..

For some reason, Non vegetarians , once they know you are a vegetarian, automatically are inclined to want to start an argument with you even if you are not one of those PETA type of people.
I wonder why !

Some kind of guilt mechanism..

I am not sure.I am only telling myself, " I am making decisions for my life.Why is my decision making you want to start an argument with me?"

anyways...Each time, someone is on the verge of inviting me somewhere, I am cringing..and telling myself,"oh no...not one more invitation, again !"

I am starting to think that i must start saying this perhaps, "0h , but i am a vegetarian,!" and then perhaps they might just out of courtesy(cursing themselves for having invited me in the first place, go ahead and offer to cook something vegetarian especially for me.

Ofcourse, then, just coz they were taking that extra trouble for me, i accept the invitation and then i go .

Ofcourse, I am treated like an alien, all coz i decided not to slaughter an animal for my dinner.Hmmmm.

Then ofcourse , they start discussing me behind my back , as to how much of a trouble guest i am and how they are needing to accomodate for me..(yeah right, kill the animals.. yeah kill them,look who is accomodating, The animal kingdom.Yeah , like they have a choice !)

Hmmmmm.,,,A long pause and then finally i decide that the next time , i get invited , i have to politely refuse..

Can fellow vegetarians give me politically correct refusal statements..please?
So yeah,what do i do?