In my family, I have always been vegetarian, but my husband is not. My son's biological father is also non-vegetarian. When we were together, he became veg. But past divorce, went back to meat. He has continued to feed our son veg when he's with him though. My son is used to his Dad eating meat and even his step dad. I hope this teaches him to respect all and for his preference to be more ingrained since it is tested.
What is the situation in your family? Do you have support from your family for your dietary choice or do you go it alone? I think it is significant for a child to have even one vegetarian parental role model.