You need to realise that many of these chatsites are overrun with scumbags who are only interested in some form of cybersex. Most of the girls that sign up to these sites have probably come across their fair share of them and because of that I think they condition themselves not to get carried away with it all for fear of being led on and getting hurt.
You may have told her you are going to visit her, but take my word for it, she won't truly believe it until she meets you at the airport.
Iain.