ANSWER PLEASE. ASAP. ?

[SUN]

So me and my boyfriend, A, broke up in April. I just didn't have strong feelings for him. it was completely dumb, I wasn't thinking. So he got with my friend, D, after that (Shes not good with boys, and she's kind of a skank..). So they just got back together, and then she dumped him and came to me for advice saying it was dump of her to dump him and she wasnt thinking. She said shes in love. And that shes going to ask him out tomorrow. I was super nice about it. But I was going to ask him out tomorrow to. Shes getting to school early so she can get him before school starts. She doesn't know I like him, a LOT. She is going to break his heart again, like I said, she is NOT good with boys at all. Her friend told me that Im going to get him, and he was the one who told me shes not good with boys at all. My friend said that If I show A that I like him more than she does, then I'll win him over. I have very strong feelings for him and I KNOW that I will treat him way better than she can. She's always a ***** to him.. And he totally deals with it. He just brushes it off like its just casual. I want him bad. And also, I posted a thing on facebook saying My crush is.... A. And blocked her from seeing it. She wants to know who it is though, and if I tell her its him, she would get really pissed at me. What am I supposed to do? I want A really bad.. I think Im in love with him. Please help.. Give advice.. I wont move on. No. Also, he never says no. He never dumps a girl. He's always the one who gets dumped. I feel so bad for him. Hes such a sweet guy. So he would guaranteed say yes when she asks him out.
I CANT BEAT HER TO IT. She is going to ask him the first second he walks into school. I cannot beat that. I take the bus.
And she has dumped him 3 TIMES. I dont plan on "stealing him" Im no slut, I wont cheat with him.