Trinity3000 said:
Did you call dibs on her? You shoulda.
I'm way late to this thread, so this is largely irrelevant to Lance's present, but given your track record, maybe my 2 cents can be worth something in the future. (I say that kindly...and I totally looked for signs of this chick on your fb wall.)
The dibs system is a handy one that can save lots of trouble. Now I'm a fairly aggressive girl (not explicitly with guys, just, I say what's on my mind and go for what I want) so that might be part of why I have no problem if there's a guy I want, telling my friends "dibs!" Dibs, gabriel, does not imply ownership, and I don't think it's offensive - just clearly expressing interest and asking others you don't want to fight with to back off. My (respectful male) friend who introduced me to the theory thinks "dibs" ends after 3 days if nothing has happened - you can't just call it and make no move, and you can't hold the dibs if the other person doesn't reciprocate.
Basically what I'm saying is, although the guy seems to have ignored obvious signs the first night that you were interested in her, you should have said something when you noticed the facebook messages, or even before it. I don't know why this never happens with girls - maybe we read our friends' interests better, maybe we just tell each other earlier, maybe we are more respectful.
Your friend does sound like a gigantic douche, misunderstanding and subsequent conversation aside. Both in how he treated you, but more in how he treated the girl - and mostly, I got the impression this treatment of women is habitual, to the point where it's caused him to treat you badly. Now I am not criticizing a college student wanting to get laid - but there are respectful, charming ways to get laid with a college lady.
(and respect and charmingness don't just apply to getting her in the sack...they should exist in the sack too. sadly, many college-aged guys don't understand this.)