Someone is trying to break us up

So my bestie and I have been friends our entire lives, but then one day my bestie brings along the new girl and we befriend her. I really liked this girl she was nice. Now I realize that was all an act. She is trying to break me and my bestie up. This girl is constantly trashing me behind my back and telling my bestie not to be friends with me. My bestie is a good friend tho and would never leave me… or so I thought! My bestie is constantly ditching my to be with the evil girl that is trying to break us up. We all had a sleepover this weekend and the evil girl was constantly talking about what she plans to do with my bestie once I fall asleep. My bestie however was ignoring the evil girl. Yay! Then in while my bestie was asleep {she is a deep sleeper} I saw that evil girl cuddling her and stroking her. Ummm creepy?! Oh and I forgot to say the evil girl even admitted to haveing a HUGE crush on my bestie. The best part was that my bestie regected her and said that she is not gay. That made their friendship slightly worse. YAY! The evil girl is OBSESSED with my bestie. Even people that are not friends with the evil girl know that she is trying to break us up and that she is obsessed with my bestie. One thing that I know is that if is came down to the two of us my bestie would choose me… or so I thought. My bestie said that if it came down to the two of us she would choose the evil one. Her plan is working. UGGGGGGG!! What do I do? 😭😭😭😭😭😭😭😭😭😭😔