Friendship issues
We all have friends we fall out with and that's totally fine! When you argue with someone make sure you think before you speak. You are basically blinded by our own view so we don’t listen to the other person and you are telling yourself you are right. If you are wrong you have to at least try and accept it. I know it’s hard for some people since you might have anger issues or any other problems.
Try to forgive each other, it might be really hard but it will sort it out. Tell each other how you feel or get someone to help you with it.
Try to repair and rebuild, it's best with a teacher. The repair and rebuild questions are: What happened? What were you thinking at the time? How were/ are you feeling? Who do you think has been affected? What needs to happen to put things right? Does there need to be a consequence? These could help a bit. If you do have anger issues or any other problems that's absolutely fine!
Take some time to calm down and once you have done that try to talk to them again and apologise, only if you need to apologise though.
And Finally make sure to not pull other people into the argument, that makes it worse.