this and that. and boxer, by all means, do like it never happened. our conscience is just a figment of our imagination anyway.

As was already mentioned, the one from Facebook is likely a scammer, either that or a solicitor. If a solicitor, sooner or later they are going to try to get you to subscribe to a website. In fact, if you check out the photos by using something like TinEye.com, she will probably turn out to be a porn girl, and those photos are not really the one contacting you.

Scammers do the same thing. It is waaay too soon for a girl you barely know to be telling you that she wants to be with you. In fact, she now has access to your Facebook account, your cellphone, and probably your email. That means she can hack all your contacts to either sell the info or to try to scam them also. The next step is to either steal your credit card/bank card info, or to ask you for money. DO NOT TELL HER YOU HAVE FEELINGS FOR HER. Once you do, that opens the next phase in the scam. They play off your trust, and feelings are a sign of trust.

Block her. Ignore her. Change your passwords. Get out before you get burned. They are rampant on any form of social website.