Most Helpful Guy
Most people would say that is not a friend. She is doing something wrong but he may be an innocent bystander. You should tell him that your "Amber" (or whatever her name is) is your friend and she only started texting him after you two started texting. If he has character, he will not condone that type of behavior and will stop texting her. If he continues to text her, I would suggest letting them have each other. If that happens, you have discovered that your friend was not truly a friend and you have avoided wasting time on a guy who does not appreciate good character.
Most Helpful Girl
They're both wrong. I wouldn't trust either of them from now on.