For clarity's sake, I'd just like to make the disclaimer that when I met my current paramour it was on a site where it was considered charming to send a picture of your cock along with the first communication. It wasn't a "dating" site. So my mention of it was kind of a joke.
And I must say, the picture was very charming (mmm-hmm), but it was the words that started to flow into my mailbox soon thereafter that got me hooked.
Try writing to her. Something that expresses your personality and what you find attractive about her.
Disclaimer #2: I have no idea what facebook is and how it works.