Who is wrong me or my "bestfriend"?

A couple weeks ago, the day after valentines, I spent the night at my bestfriends house. Theres this girl who used to be bestfriends with my current bestfriend and she really doesn’t like me because I “stole her bestfriend” but I see it as, if someone doesn’t wanna hang around you, there not going to. And my bestfriend talks so much dirt about this girl. Shes “dramatic, annoying, extremly rude, fake, trampish ect.” anyways, since it was on a sunday that I spent the night we had school the next day. When I was getting ready for school my pants ripped. I asked her some of hers because I wasn’t about to dare call my mom and ask her to bring me some one because it was he first day on a new promotion and she had to be there at 8:30 and she works almost an hour away and it was 7:40. Two because I would be in so much trouble. So I tried on hers- they were way to short. So I called my mom and got yelled at like no other. She agreed to bring me pants though. School doesn’t start till 8:30 and my bestfriend lives two minutes away from school. She came in the room ten minutes later and said were leaving, can your mom take you to school? Then proceeded to call me selfish because I woke her dad up from my crying. They left and my mom showed up at 7:50 and I got in the car bawling. I got my phone tooken away, grounded for three weeks(including church so you know she was mad), I walked into school with my makeup all messed up and I cried till third period and worst- I got my mom demoted from her new position!!! And now my bestfriend hasn’t talked to me in a month tomorrow. She also went up to the first guys that I liked and spread stuff about me. And worst, shes hanging around the girl she used to talk trash about. Her birthdays this week and we planned on making a big trip to colordado. What do I do? Am I in the wrong or is she? Overall, how do I handal the situation?