Mah Friend iz a back stabber!!

You are dealing with someone whose character is flawed. Knowing her nature, if you continue to confide in her you will continue to be hurt.
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A scorpion and a frog met on the bank of a stream. The scorpion then asked the frog to carry him across the stream by giving him a ride on his back. The frog replied, "You are a scorpion and scorpions sting. How do I know you won't sting me?" The scorpion said, “If I stung you then you would drown and then I would drown also." The frog is satisfied, and they set out. In midstream, the scorpion stings the frog. The frog feels the onset of paralysis and starts to sink, knowing they both will drown. The frog looks at the scorpion and with his last breath asks "But why?" Replies the scorpion: "You knew that I am a scorpion and it is my nature to sting"

Just like with the scorpion, people are what they are, and not what we would like them to be.

...okay, I don't like to call people names... but right now I have quite a few names lined up in my head for your "bestfriend" (sorry) I guess you would have lots of fun to be with her but when it comes to you having a relationship, she would be a really big problem... for obvious reasons... if I have a friend like that I would have a good chat with that person and tell him/her to stay clear from the people I like if he/she is just gonna play them, if that doens't work, I would leave that friend.... as for the guy you like, tell him how you feel, since you friend is not serious on going out with him, I say just go for it... I wish you the best :)

well I think you can safely stop callin her your 'bestfriend', I dont think even 'friend's do that, cuz hmm if one of my buddies did that to me, I would talk to him and if that doesnt work then I guess a punch in the face works, Im not really THAT violent but you seem really pissed and I bet I would be really pissed too...

k what would be a good thing to do, is to get her, all the guys together and show her how first of all, they are gettin played by her and second of all how she is playin you, just show it to HER and show it to that guy or guys (dunno how many are involved), maybe she just doesnt get it and a bit of realization will help.. and yaa.. like everyone else said before, TALK TO HER if you didnt yet, but this serious talk, tell her that you care about her feelings and about your feelings, but what she is doing to you is not fair to both of you