A twist of fate will change our future plans forever

I just read this book entitle Rosie Dunne by Cecilia Ahern. Im sorry if im a lil bit a step behind from others since i just pick up this book recently, but this book really bothered my mind on one thing. A best friend can be your partner of crime, your love and your soulmate- for real. I'm not totally agree about this before. My best friend will remains as my best friend, but the way Cecilia Ahern describe on the characters and the story is really related to our real life. i enjoyed reading this book and able to finish it within 2 days. Guys n girls, do you agree with Cecilia? Will you fall in love with your best friend? just wondering..hu3