Closeness of friendship

He knows everything about her, right from her favourite books to her favorite bra. She knows everything about him, right from his favourite soccer club to his favourite x rated websites. He will complete her English homework, even at three in the night. She will arrange an Armani suit for him, even if it calls for flirting with ugly guys. He has her picture in his wallet. She has his number on speedial. They talk to each other all the time. They talk about each other when they don't talk to each other. They discuss everything from periods to PlayStation. They have tasted alcohol and then thrown up...together. They have bunked countless tuition's... together. They can't live without each other. YET They don't love each other. They are JUST FRIENDS