Do people mean what they say when they're drunk?

I've never been drunk since alcohol taste gross to me but I do have friends who drink. I'm always the sober driver. Recently, one of my friends got so drunk that she doesn't remember all the terrible things she said to me while drunk.

She said some cruel things, and I'm wondering if people mean what they say when drunk. I tried telling her what she said, and she kept telling me she didn't mean it and was drunk. But, I think that's a lie. The least offensive thing she said was, "The only reason we let you hang out with us is so you can drive us. We wouldn't even talk to you if it weren't for your car."