I'm a 17 year old girl who just came out of the bi closet. Anyway, I have this best friend who I've known since I started high school at 13. I'll call her "ann" and things were great between us until a few months ago when she just came out of her shell overnight and started partying with all her new friends and completely ignoring me because I'm a social outcast. so she got a boyfriend (I'll call him "mark") and a month later, (back in march) this girl asked me out, so now I'm dating her I'll call her "rachel" shes really romantic and she always tells me she loves me ^_^ Ann was a little surprised when I told her I was dating a girl because I never have before but she said we made a cute couple so I was glad to see she supported us. anyway, ann was really unfaithful with mark, because she kept telling me that he bored her and that she was meeting other boys at concerts and taking phone numbers. I was surprised at how much she changed, but I kept quiet and didnt say anything to mark. The sad thing was, he worshipped the ground she walked on. he remembered their monthly anniversaries and she didnt give a damn and ignored his msgs. she waited until he came back from vacation and dumped him about 2-3 weeks ago and he was heartbroken. I asked ann why she did that and she just said "you're such a wet blanket, I need to branch out and try new things" the next day she started saying things like "hey, seeing how close you and rachel are makes me wish I had a relationship like that. I think I'll try dating girls too" which I was fine with me but for the last 2 weeks now shes been flirting with rachel and telling her she looks beautiful and rachel is flirting back to make things worse and its in front of me. god only knows how bad it is when I'm not there. I cant stand anns new selfishness. she used to be so sweet and shy and now shes telling my girl she looks gorgeous and blowing kisses at her. If I behaved like that towards mark back when she was dating him, she definitely would of told me off. what should I do? rachel was the only person who ever said "I love you" to me and I've been used by exes so much in the past. I dont want to be hurt again. am I over reacting? I just think its an odd coincidence that ann broke up with mark as soon as she noticed how loving and supportive rachel was with me