My parents won't stop lecturing me about being vegan!!! They think I'm being too extreme. what should I do?

It's driving me nuts they won't stop talking!!! I've tried reasoning with them but they think I'm hurting my self and it won't make a difference. I know they care about me but GRRR it's making me mad.
Update: I was veg for 2 year and I've been vegan for the last few months. I thought they were over this issue but they aren't. They're talking my ears off.
Update 2: aaawww thanks scottie *your* a star ;)
Update 3: thanks fluffycat you such a sweetheart ((((vegahugs)))))
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