[BretWeir]

If you value [censored] this girl more than your friendship, then go. If not, don't.

Even if you have no intention of hooking up with her,

(1) when you get there, you're both going to be very, very drunk, and there's no telling what could happen;

(2) from the way she acts around you, it sounds like she has less-than-pure intentions, and going to this thing as her second "date" will just encourage her; and

(3) even if nothing happens, if I were your friend, I'd be pissed to have you hanging around fake-dating my girlfriend.