My friend can get a little embarrassing, and quite rude sometimes. If someone she loathes comes up and annoys her, she gives them a stare that looks.. Well.... Stupid, and then they laugh in her face. She tries to act tough and it gets on my nerves sometimes. And then if someone provokes her, she gets on a huge rant in their faces how they think they're so big. It makes me really embarrassed, but I seriously don't want to tell her, because she can get hurt easily.. She gives you the cold shoulder and then ignores you. She talks about teachers she hates loudly and I have a really guilty conscience after. Me, her, and 2 others are best friends in a group. But if we fall out, I'm worried our group will too. I'd feel so upset if that happened, and I could never bare it. I know it sounds like a complete bully, but she's one of my best friends in the world, and I don't know where I'd be without her. Help?