I am really upset.... Please help me?

So I'm 13 in 7th grade and me and this girl let's call her, "Aly" were sooo close. We would wait for each other at our lockers and would do everything together. She was such a sweet girl. And then in march this girl named Taylor who liked me last year, but all of a sudden she decides to not like me!! And then she would force aly away from me. In this past week me and aly were so close, like normally. So yesterday I'm txtin aly and she's tellin me how there's a dance, or might be. Ik that she had girl scouts, so she was with Taylor and this girl named Kim who I don't think likes me very much. So then I was down my side street with my neighbors/bffs. They're my bffs also. Soo then I get a call from Aly and she said there was no dance, so i'm like watever. I was walkin around outside talkin on the phone to her. And she says "I Just wanna be ur aqquaintince... I don't wanna be ur bff anymore. Our friendship is fallin apart. We hav nothing in common (which we do), and then she's like, so let's not rly talk as much okay? And then I'm like shocked... We had no fights or anything! Then I hear "I don't like u....." and I said "o I hear a noise." and it sounded just like Taylor and Kim. It obviously was them. Aly says, "it's my radio. I'll turn it down.! Then I hung up, and started crying. We were like sisters. Now I won't hav any bff in my grade, AT SKOoL. My whole life so far I would hav a bff every school year and each time it wouldn't work out, like the person would be a jerk to me... It seems like there's something wrong with me. I'm rly nice to every1, but I don't get it... I hav other bffs, but alY was that bff in my grade. Wat should I do on Monday?