my best friend hates me

my best frined and I used to do everything together, after a while some more people started hangin round wit us I didn;t mind because they wer nice people. soon she started ignorin me and hangin round with the new friends she had made, they started to reject me and even admitted to it one day. I started complaining to them but it just started arguments and made things worse, then they started takin the piss out of me sayin I had big ears and they whispered if summin was rong wit my hair and didn’t tell me. I complained again but then it became a constant thing for us to argue. one day I got really paranoid and asked all my frineds if I was a good friend or not because they always make fell like everything is my fault. most of them answered the question with a yes but stop complaining or summin like that but one of them would not answeri askd her many times but she kept changing the conversation. in the end I got really annoyed with her an shouted then she got in a mood. I cant remember what happened but we argued. I was going on holiday the day after and she sed summin about dying and I said I was going to hijack the plane and crash it into her house and that I wouldn’t be at her funeral. she knows I didn’t mean it beacause I was so angry but still she keeps ignoring me. I want to sort this out. I know it was mostly my fault but I said sorry so many times but still she wont tlk to me. she has now got all of my other friends to h8 me too even tho I did nothin to them. what should I do???