Well, I really don't know how old you are, but if you're like.. ummm..see well 14 to 20 years old or older, here's something that what teenagers and adults have to do. When they get into a fight, they have to think about their actions, their manners, and the things that they did are wrong or not. If they want to be good people and start acting like those kind of good people, they must try discussing about it and see if they can work it out. That's what friends and good people would do.
In other words, they should at least try working things out first by discussing, apologizing, and admitting that they made some mistakes. Normally, people need to think first before they say or do something which is true. But when someone does something or says something bad or unnecessary, that doesn't mean it's too late to think and realized that what you've done/said is wrong or not. So if you feel like it wasn't right for you to do, just work it out with that person. :)