what the hell is my friend all about?

[Lima]

Ok so my best friend and I are very close and normally do a lot of stuff together. We also have so much in common and she told me a couple of times that she felt like I was the only person in the whole world that really got her, I felt the same about her for a while but lately I've noticed how different she acts in front of other people e.g on twitter I can see her talking to another good friend of hers, this is a girl that I have never met but my friend always talks to me about her, I have honestly never heard her say a nice thing about this girl, she is always telling me how stupid she is and kinda mocking her behind her back so I figured they werent that close, but then they went on holiday together :/ and this girl got twitter, so I could see the way the spoke together, they are constantly joking about sex, nudity and blowjobs, when shes with me she never talks about stuff like that, infact she acts like a bit of a prude & no it isnt because I act like one coz I dont, I'm just more classy lol.
She also dresses a lot more slutty when she goes out with this other girl n no its isnt because this girl is a slut in fact shes the opposite, she looks like a complete geek, she wears square glasses and has a really old fashioned haircut.
Also my friend also says to me that she cant stand Rihanna but she tweets Rihanna lyrics to this other girl. I just find it strange, I mean I know some people act slightely different around others but this is kinda extreme like a personality transplant plus we are in our early 20s shouldnt she be more confident in herself to be herself rather than changing herself around whoever? She's not even like shy or anything.
I also learned that with a couple of girls from college she went to a stripclub I found this odd since she had always went on to me about how much she hated those places & was crying because her boyfriend went to one, I found this kinda funny and hypocritical.
Also its not even as if she copies everything I do or say, she acts different from me in my company, its not as if she acts like my clone when shes with me, I am more fun and kinda wild than her, she normally acts quite uptight & a bit moody with some people, so I dont know why its different when shes with others.
Also she never likes to drink much and sometimes when we go out to party, we dont even bother with alcohol, she says she hates drunk people and being hung over but when she goes out with others shes sitting there in photos with a massive cocktail jug to herself and even being sick and lying on the street half out of it, WTH this is bewildering to me because she is so keen on not drinking at all when shes out with me and she is so bitchy about people who get into a state while drunk, i'm just kinda like whatever each to their own but she acts to me like it really bugs her then she goes n does it :///////
I also fear that she may b***h as badly about me as she does about others to me. I asked her recently "What do you think of me?" She replied "I think you're the coolest person I know."
Ugh I just dunno what to make of it, any ideas on what the hell is up with her?
I know people think she's trying to fit in with whoever but she doesnt like try to act like me, its not as if shes copying whoever shes hanging out with. We don't act the same when we hang out, we're different people but what confuses me is why does she getS a different personality around others, I hate her fakeness, she tells me she hates fakes too but she is the fakest person i've ever met, its becoming plain to see

[sillychin021]

Your friend is putting on an act for both you and the other girl, she's acting the way each of act to fit in with you guys more perfectly, I wonder which one is her true personality

[Lily]

Omg I met a lot of ppl like this and even my best friend is like this but I still love her. My tips would be: 1. Never tell her anything about ur other friends especially negative or mean stuff 2. Never tell her secrets 3. Try to hang out with other ppl more and become closer with them 4. Keep a bit of distance b/w u and her 4. Just stop reading her tweets and try not to ask anyone where she went or what she did and even if they tell u just don't think about it, u obviously shouldn't waste ur time thinking about her nor caring about what she does

Good luck

[Hara]

I suggest speaking with her about that. And I know that's not an easy thing to do. I was in a similar situation where I had a friend that did sort of the same thing. The girl is possibly putting an act on either you, the other girl, or both of you. But I would definitely speak to her about it.