I'd say that's it's pretty common, plenty of girls wear clothes like that - on a night out, the majority of girls will probably be wearing things that short and tight. And I think it only looks slutty when a girl is slutty. On those girls it just looks nice, pretty, hot - but not slutty.
I think it looks good. I don't think it should change your opinion of her. She was just trying to look nice, and probably attract someone. She obviously knows when it's appropriate to wear certain things, because she dresses more modestly for lecture class. I don't think you can label a girl anything just based on one pic. I mean just because she went out and wanted to look nice doesn't mean this one look should define who she is.
What you mean you changed your opinion because you saw her night outfit?
Many girls wear that these days specially if you are thin if they were more curvy would seem slutty...i personally couldn't wear it I would look slutty...
I guess you have to talk to her and see how she is...
What would I think? I think she follows fashion is secure about guys looking her tuch lol
she looks really cute, I think you are way too conservative. this is 2011, girls aren't wearing loose shapeless skirts down to their knee when they go out. it doesn't really matter if you don't like her anymore because she dared to show her thigh, I'm sure there is a guy right now she's dating or would love to date her that doesn't care