First you should have asked her how bad she wants to know.
Parties are always kind of iffy if you are trans, especially younger. I didn't care, but still there were times that were kind of awkward. I still didn't care though. there was enough people that would make sure I wouldn't get hurt physically.
Slurs? Hon, get used to them. Don't let them bother you. I remember when gay was a slur, now not so much. ->-bleeped-<- or ->-bleeped-<- or heshe or anything else other than an "it" don't bother me. Most cis and a lot of self proclaimed LGB people don't really have any idea what names offends us. OK so she was the gayest bisexual girl that you ever met. "Gay-dar" I would assume is kind of insulting to gay people. What is the difference between "gay-dar" and "->-bleeped-<--dar" believe me if ->-bleeped-<- was the worst thing that I have ever got called in my life then I would be OK with that.
OK, disclaimer time: ->-bleeped-<-, ->-bleeped-<-, HeShe, SheHe or any other label I may get named really don't bother me too much. Break it down and I really am a She inside but male outside so... I am an actual he on the outside but She on the inside, so... And I am a She on the inside and a he on the outside, so... As for ->-bleeped-<-, well since I am trans I guess that could be however you look at it. But a freakin' "it" that takes our humanity away and makes us into something inanimate. "It" makes us into an object that is no more than a rock. So all the other names still leaves our humanity intact but being called an "it", that is the ultimate insult to me. The other names I can lie with because they are just descriptive in nature by ignorant people that know no better. Don't let it bother you too much, educate with empathy and it really sounds to me like you could have had warm blooded company tonight instead of being alone talking me. Is it too late?
But don't let it get to you solexander. People know what the know from their own experience. Oh hon, if she would have had good ->-bleeped-<--dar and she was cute, no way I would have been hurt. Even if she was not so good looking. Or if she would have been a he and cute or depending on my condition, not so cute.

Just don't let it bother you too much. Like I said the only thing that really hurts and offends me is when someone calls me "it" and then the nails come out and the tounge like a razorblade gets going.