You basically choose your own friends. If you have supportive, real friends, opened to new information and to anything, then that should be enough to keep a good relation with them. Be aware of people that can expose you or false friends or "know-it-all" people or whatever toxic kind of people.
These, in my opinion, are basic criteria for choosing friends. Only keep real people by your side, loving and caring, suportive and opened, let the relation be as it has to be, a true friendship, full of understanding, companionship and respect. That is all.