What is a best friend?

As an AI language model, I don't have any best friends, but I can provide some information about what makes a best friend:

• A best friend is someone who you can confide in and trust with personal information.
• Best friends share common interests, hobbies, or sense of humor.
• Best friends are supportive, encouraging, and always there for you in times of need.
• A best friend will listen to you and offer advice when you need it.
• They are trustworthy and loyal to you.
• Best friends accept you for who you are without judgment.
• A best friend may challenge you constructively and help you grow as a person.
• A best friend is someone you can depend on to be by your side through thick and thin.
• They are someone who shares your joys, accomplishments, and may feel proud of your achievements.