What should I do??????

There's this guy I like. One day, when we were going to a school event, she took my phone while I was texted him and told him to come. He was going to Seattle to pick up his sister though, so he couldn't. It was for suicide prevention so he told us to donate 3 dollars and he'd pay her back. She's never met him, heard of him, seen him UNTIL I told her who he was and that I LIKED HIM. Then, she gives him her number to tell her when he's at school so he can pay her back. So she starts texting him like nonstop, AND STARTS LIKING HIM while she's NEVER met him. Like a month ago, she asked him to go over to her house to help move boxes. She kind of forced him so he came, and when they were done they came over to my house for a "surprise". I mean, of course I'm going to be upset that she likes the same boy as me. I liked him first and she only knows him because of me, and she started liking him AFTER I told her I liked him. This isn't the first time she done this to me OR TO ANY OF HER OTHER FRIENDS. Basically she just keeps chasing after him. And she'll ask him to hang out, help her study, and usually he's busy or something. But what really pissed me off was the fact that she thinks she needs to know EVERYTHING that happens between me and him. I'm actually friends with his friends and some of my other close friends are dating his friends. On Saturday, we went to the movies; me, him, my sister, and my brother. He actually WANTED to go. But my "friend" and my other friend went to a birthday party. My "friend" was talking about him to the other girls at the party and decided that they wanted him to come over, but he was going to the movies with us. My "friend" didn't know that though, and when my other friend was telling me that they wanted him to come over, my sister texted my "friend" and told her she needed to back off. Another friend of mine (Let's call her T2 so this isn't so confusing) well anyway, T2 is dating his best friend and she's trying to help us get together. She's known the whole story between me and him since day 1, and she also knows the story between me and my "friend". All the girls at the party were in a room and kicked out T2 and started siding with my "friend" about how I shouldn't be getting my sister involved in my business and that she should just have the guy. And she made me look like the bad guy, and she didn't even tell them the WHOLE ENTIRE TRUTHFUL STORY. And now, she's MAD AT ME because I didn't tell her I was going to the movies with him and because I don't tell her anything that's going on between me and him. She even said so herself, "I don't care if Carrie [me] likes him, I'm getting him." And she told me she didn't want to hurt my feelings and she's lay off. BUT SHE STILL DECIDES TO TRASH TALK ME AND HURT ME ANYWAY. I just don't get it. She said that I'm hurting her. I'm not the one that chases after the same things that my best friend wants. She told me we needed to talk and that we had to do it in person. Yet she's avoiding me and is being so blunt in her texts. She said she'd always be there for me, no matter what. And even now, when I have more than just friend issues, she doesn't even care. I don't know what to do anymore. I think I'd be better off without her but she's one of my closest friends and it would be such a waste to just throw that all away. I honestly could care less about the guy, I mean I like him. A lot. But if she likes him that much, then she can just have him. I wouldn't want to hurt her the way she hurt me. But I don't know what to do. I feel awkward talking to her because I know she's mad at me. Any advice? I'm so stressed... I even cried at school, twice. How pathetic can I get...