It is inevitable to come across conflicts and misunderstanding, but everything is part of growing up together as individuals. No one is perfect. We all mess up at some point in our life.
You might have unintentionally thrown a hurtful comment towards your friends, and you sometimes can hardly control the things that slip out of your mouth. That’s normal. Both sides must have had a bad take on each other, and both sides must be ready to face it and deal with the mistake.