How can you tell if a girls being nice or fake and bitchy with you?

I'm very shy and was bullied a lot growing up. Wherever I'd first start a new school all the popular girls want to be my "friend" but I could never tell if it was genuine or they were just finding away to bully me.

They'd tell me i was cute, that I looked like barbie etc but could never trust if it was fake or not so stayed away from them. I remember the popular girls were rating other girls in are school year and I apparently got voted the most prettiest girl but I just felt awkward and embarrassed like they were either saying it because they felt sorry for me or were making fun.

I don't usually get told I'm pretty from other girls now in adulthood but I went out recently and some girl in the bar stopped to tell me I looked like something out of a Jane Austen book and that I reminded her of Dakota Fanning. I just said thanks but I couldn't tell if she meant it and was being fake with me.

You know like in mean girls were Regina tells Katy she's really pretty and then she says thanks and she replies "so you think your pretty?" That's how I feel when girls give me compliments.

How can you tell if a girls being nice or fake and bitchy with you?
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