So this weekend I went to banquet (weekend of drinking at the beach. Each brother brings a date) with my fraternity. So on the final night I went and smoked with a few friends. As we lay there enjoying the amazing stars and such a group of friends wanders over. At this point my date, whom I am just good friends with, has headed back to the room. We all get to chatting and I quickly begin to take charge of the conversation. One of my friends dates (they are just friends as well) is very clearly into me, and I begin escalating kino. By the time we are all walking back I have my arm around her waste and she is leaning on me heavily. We sit on the beach closer to the hotel and some friends decide to go skinny dipping. My friends date doesn't seem interested so I opt to stay on the beach with her. I keep escalating and eventually she's rubbing my inner thigh. Heres where things fall apart. Her date, who is hammered, comes back and wants to leave. I decide to accompany them, and while walking back my friend leans over his date and says, "don't you love "racaza". She says, I like him alot. They ended up going straight back to their room and passing out, and eventually I did the same.

Heres my question, I really wish I got her number, but I sadly did not. So 1) what are good ways to ask for a girls number, and 2) should i try facebook friending her and setting up something that way?