I think my 'friend' is lying to me and making stuff up for atten

This 'friend' isnt very nice to me, she makes fun of me because of the way i look and the way i talk.
She was making fun of my taste in music, and now she's sending me on a guilt trip because i'm going to a concert and she's not.
She tells me stuff, like...
she killed her first boyfriend because he tried to rape her, and she went to court and got off on self defense and her mother never even found out.
That she gets beaten so much that she doesnt even bruise anymore. Which isnt possible either.
She's got cuts on her wrist, which are all exactly the same size and same distance apart. and they're on her wrist which i read can indicate that she /wants/ people to see them. (i dont mean to offend anyone by saying that, i used to cut too, just in places people wouln't see)
She acts like the stereoptypical emo. Like...she'll recite depressiong poetry out of nowhere, infront of poeple hse just met, and when i had my drawing stuff with me, she started using my smudger to make scratches on her wrists, when i told her to stop, she said it 'looked cool'
I dont talk to her anymore, but she's best friends with one of my good friends, so i cant just stop hanging out with her or i'll loose a good friend.
What should i do.
The other girl is one of those people that if you piss her off she'll exagerate it and start spreading rumours around about you so i can't say anything to either of them becaus i dont want to risk that.
What should i do???

You should get some real friends, that would be my first suggestion.

"isnt very nice to me, she makes fun of me because of the way i look and the way i talk.

The other girl is one of those people that if you piss her off she'll exagerate it and start spreading rumours around about you so i can't say anything"

None of this would come up when I am describing the people I call my friends. Don't be afraid, go out and find people you mesh with.

Yeah, you're still very young. You have plenty of time to find good friends. Finding people who really fit your personality and who you enjoy to be around all the time takes some experimenting. But trust me you wouldn't want to waste all your high school years with friends you don't like being around or ones who cause you problems. High school can be fun with the right people.

I don't mean offense by this, but your 'friends' sound like real nutters.

Real friends wouldn't send you on guilt trips because you have something good going for you. They'd feel good that you have something good going for you and maybe jokingly say "Wish I was in your shoes!"

A real friend would compliment you on the clothes you wore that day or how you did your hair, not insult you on the way you look/talk or what music you listen to.

Real friends wouldn't spread hurtful rumors. It would be better to have no friends at all than to have friends like that. I've had better enemies.

Theres one simple answer.....if someone isnt good for you then burn the bridge and get rid of them....did the exact same thing myself a year ago.

But the thing is, the one girl...the uh, nicer one. is actually a really good friend and shes only mean to me when she's around the other girl.
Shes the only one i know who shares a lot of the same opinions and we like a lot of the same stuff, she can be a really great friend...until you get on her bad side, then she can be horrible.
But i'm a pushover and would never do anything to get on her badside.

"But the thing is, the one girl...the uh, nicer one. is actually a really good friend and shes only mean to me when she's around the other girl."

^ Before I comment on anything else I just have to say... Real, honest to God, true, down to Earth, friends would not treat you or cast you aside for anybody like that.

Well it sounds like you've got one terrible, attention grabbing, slightly crazy friend and a two-faced friend. Not worth your time or friendship, in my opinion. Like everyone else said, you need to move on and find some better friends. Friends who appreciate you for you, who don't make you feel bad about yourself, and don't put you in these kinds of situations.

Thank you to everyone.
once school starts, i'm going to try to find somewhere i fit in. <3

Yeah the girl that youdont like sounds like she needs some help,,, and you need to find some better friends. unforunatly thats easy to say and extreamly hard to do.