Now is your chance to be her hero, I hope.
My bet is this. He flirted a lot, she has told you "he" touched her heart, but follows through with don't worry..
"Some" people go to the net to fill a void, something missing. This guy (10 years older than her who she never, ever, met) is like a bro? No, I think he charmed her, but she didn't not go with it.. As a result he deleted her, as a result she is searching for him (no closure).
She met him on the internet, (he may be 30 years older) he may be real at 10, bottom line is, he filled a void and you need to find out what that is and how you two can get in tune against that void, it could be simple like being told she looks nice. But there was one.
So... There are hundreds of stories of people who con people over the internet to try to get their prize, and there are serious stories as well that I don't want you to think about. Thank goodness he deleted her... Think about it, he didn't get what he wanted and so he deleted her.
She needs to consider this... A true "friend" doesn't delete....