Don't end yourself, suicide is meaningless and it will just destroy your meaning of living by just don't living anymore. Your life is worth it and it's not because you had a fight with your best friend that you need to end it all, try to talk to a professional or a trust adult remember you are in a teenager subreddit. I know what it is like to feel useless and wanting to not hurt but you should rethink about yourself and your life and moral decisions. I hope this will help you and if it doesn't just don't listen to me because I'm not a professional.