I have a friend who is a compulsive liar. These days, I don't know if anything truthful ever comes out of her mouth. I know it sounds cliché, but I don't even think she knows the difference between the truth and a lie anymore. She tells my friends and I so many things that we know are lies, but the problem is that she also tells us things that we can't be sure about. Like the fact that she has passed out from drinking and taking advil and stuff many times. We're really worried, but we don't know what to think. Some of us want to just pass it off as another lie, because the way she tells us is just so casual. But the thing is, if she isn't lying and something happens, I don't think that any of us could live with ourselves. Please help me.