Friendship can mean a lot of things. Some people can ruin a friendship by saying things behind their friend’s back. I think 100% of people in the world can hurt others though friendship.
If you say something about someone behind their back just make sure you tell them without hurting them. That way, friendship can stay strong.
Friendship isn’t only hanging with mates. Friendship is as strong as a heart. If you are kind you will have a very strong friendship with others around you. Some people have no friends. Make friends with them and they will have more then.