How to know who is your best friend

My best friend is the most amazing person in my life. The first day I met her, I was in a really big fight with another good friend of mine that is one year older than me. My best friend spent our whole lunchtime listening to me drone on about my problems with my friend and when a friend of the person I was in a fight with went past me, she said - loud enough for only me and my bff to hear - "Eeew... what a $lut". Grace, my best friend, now turned around and threatened to punch her if she didn't take it back. When she didn't, Grace punched her and got detention for the next week. Then, I got myself in detention - for the first time ever - just so I could spend time with my newly-made best friend!! <3