My best friend is mad at me, and I can't stand it?

[Mckenzie]

Her name is Elizabeth and we've been best friends for almost seven years. She stayed the night with me the other night and we were talking to my boyfriend (Hunter), and she told me about how this guy named Conner at her school told her that he is only going out with me to win a bet that her boyfriend and him made. (to see which one would kiss Beth or me first). She said not to believe him because Hunter is a truthful person. Well, she was going to pick me up yesterday to see him, but she said he wouldnt be there, so we changed plans. Then, he called me last night and was WITH her. She lied to me and I told her I was mad. (she asked me what my problem was, because I was "acting funny). Then, she said that if she was me, she would believe Conner. And now, she hates me and is ignoring me. I tried to talk to her and sort things out because I cant stand people being mad at me. And she's posting things on Twitter like "NOW you're trying to talk?" and "I hate when people blame things on me and their the biggest liars known to man" and stuff. We have only fought three times since we've known each other, and I hate her being mad at me (she's my only true friend) and I was just looking for some advice. Anyway, thanks for your time.