I think sometimes people lie because they are so insecure with the real them...It is their way of being more important or gaining friends because they feel so bad about themselves...I had a girlfriend once who did this...Always telling lies to others about what she did and always sounding so important...I just let her have her day...I knew it was a lie but you know...I couldn't rain on her parade...As long as it didn't hurt anybody else I let her go...! Not sure if this reaction was the right one but I think she felt so bad about the real her that she had to make up these stories to feel better about herself!