What is a best friend?

a best friend is someone who will stand by your side no matter what. he will never be ashamed of who you are, what you are, and how you look like. he is someone you can FULLY TRUST ( you can tell him your deepest secrets, everything about you). And for me, i think the most important thing about a bestfriend is a person who can be PROUD of you, brag things about you, and simply PROUD that you are his bestfriend