What Do I Do Now? (10 POINTSSSSS!)?

Me and my bestie were sooooo tight for a LONG TIME. She could tell me anything. We were like sisters/besties/Wifeys/cousins/buds for life. But that all changed over the last eh, week or so. I had liked this guy for 7 months. She knew I liked him. Her, My two other friends (we will call them S & R) were all going to Cedar Point. Well as we were goin there, she randomly brought up the boy. She was like "I asked (my crush) out on Friday and he was like 'I'll think about it'." S & R were shocked and even though I was shattered, I was like "oh cool" trying to act like it didn't bother me. Well while my bestie was sleeping, S & R were like "are you mad at her" in my ear. I was like "no of course not". They were like oh i would be if I were you. Nothing happened after that, and then I went on FB like a half an hour ago, and it said I was just married. I checked her FB page, and she was married to her friend THAT SHE DOESN'T EVEN LIKE AS A FRIEND. And I was like, hmm whatever. Then I went on my crushes page and he had a new profile pic (he had the same one for a year), the first comment was "omg you finally put up a new pic!!" and it was from her. Then I checked my crushes wall and she put on his wall "I LOVE (my crush)." She was like you need to text me more and he was like "We were texting last night". And then other people were like oooo (her) + (my crush) on his page. (They were acting like elementary kids but we are in 7th grade.) What should I do now? And am i in the wrong? Thank you So much(: