I was at a small birthday party with around 10 people of which I only knew the birthday guy. We were playing beerpong and I was having lot's of fun with the people there.

There is a group of 2 really hot girls quiet in a corner just talking to the people they know. I talk a bit with girl A during a cigarrete break but continue to have fun with the game. Because I was having so much fun I didn't even care about talking to the girls.

Eventually, at the end of the party we got introduced (long handshake with eye contact) and soon after we start a conversation within a group. Girl B, the hottest one, starts talking shit about how she has every guy she wants and how she dumped 2 guys last night (always backed by girl A). She sends me shit tests saying that I should earn that she friends me on facebook and to contact the birthday man for further info. I'm almost laughing my ass on how ridiculous this was.

So, what's your advice on how to contact the girl again? If I send her a friend request I'm doing without she told.