That he may have misworded his creepy approach due to being dyslexic? That's a new one. It's amazing how creative people can be when they don't want to believe their friends or colleagues are capable of unseemly acts.

Just wanted to chime in to say that I think you handled things really well, and that what he did was really not in the least bit innocent, because someone of that age has had exponentially more time to develop the ability to manipulate situations and people than a young person has, and his intentions were surely more than had thus far been laid out in black and white. He knew exactly what he was doing, and any discomfort he may end up experiencing as a result of barking up the wrong tree is his own fault; you are not in any way responsible for the results of his creepy actions.

Hopefully he thinks twice before preying on some more timid girl who might be afraid to say no to someone older who is really only trying to manipulate them into a situation where he can take advantage of them. You did good.