"I once had a conversation with my friend on being vegetarian. He asked me Are you Vegetarian?, I said Yes. Then he said that he is also a Vegetarian but he eats fish. I said dude seriously you eat fish and you are saying you are vegetarian."
You shouldn't dictate him how he should eat. Let him eat like he wants, just be a friend and be tolerant and don't bring this topic anymore up.
RE: Are you Vegetarian?