A best friend is someone who helps you through everything. Someone who you can count on. Someone who comforts you. Someone you have fun with. Someone who you tell everything. Someone you trust. Someone who tells you the truth. Someone who doesn't care to eat or drink after you. Someone who gives you advice. Someone who will like you as a friend even if you do something completly stupid. Someone who doesn't talk about you behind your back. This is what I think it means.