Would you find it difficult to want to converse with...

...the mate of a family member that you DON'T like , while at family function?

I feel sorry for the girl since she just sits there. I think " maybe i should go talk to her" but i can't stand my cousin. He acts like he's better than me, and makes rude comments towards me when no one is around.

I feel like if i start talking to her, he'll come over and say rude crap, which I'm sure would lead to an argument. I can't stand him.