Friendship is about distinguishing people and loving them. They will be unique to you, you will be unique to them. In my opinion, you should love your own friends and have the same enemies with your best friends.
You need their friends to support you. That is, to be by side in the bad and the happy moments. Let them understand you when you are sad and let them rejoice with your joy.
Another reason you need friends is to never feel alone. That is, when no one is there for you, they will be there to keep you company and help you become better.
You also need their friends so that you are not closed to yourself. That is, to share your secrets with them.
In my opinion, I will tell you again the right to a friendship is to have the same friends and the same enemies that your good friends have.