[Alle Meine Entchen]

I'm sorry but this sounds a little...odd. You say your friend is a teenage girl , so I take it you're an adult? If so, take a step back and look at how worked up you're getting over a teenage girl lying to you on Facebook. Go your separate ways and friend someone who is not a teenager.

Actually, she's stated the teen is her niece, so it's not that odd.

I've had little experience w/ teens who lie. DH's niece lies a lot, but b/c of the relationship we have, whenever I catch her on it, I call her on it. She's actually told her parents (who don't do much in the way of dicipline) that she likes being @ my house b/c I "make her mind her manners". She has tried to steal from me before and got caught. Then she lied about stealing, so her punishment was she wasn't allowed over @ my house for a while and then when she's over now (she lives 18 hrs away), she's never alone.

I think the best thing to do, in your situation, is to back off for a while. Your niece isn't going to start telling you the truth and you'll only be more stressed the more you think about it.