You know what the difference between a cold sore and herpes is? Here's a hint: absolutely nothing. You know what I had when I was that age? I can tell you it wasn't herpes.
Most girls that age are too busy making fun of poor and ugly people to be blowing them and giving themselves a permanent virus that grows blisters on their mouth. But considering the only role model she had was Britney Spears, it's a miracle she only has herpes and didn't marry the homeless guy who lives in the sewer.