My daughter has always been a bit stroppy. But it seems to be worse. She's not saying very nice things to her friends and I'm not sure why. Her other friends don't appear to say it. The other day she said I'm not going to be your friend. I know a lot of kids say this but I don't want other kids to think she's horrible. Amongst other things she says. I've tried telling her. But it doesn't seem to sink in. She was playing with friends and something happened and she stamped her foot, folded her arms and stormed off. I asked her why later and she said it was because they wouldn't let her do something. Am I just being really sensitive or does anyone have any ideas? She is an only child if that makes a difference??