Your best friend is like no other and there's no doubt you get on really well: whether she's a friend from work, the mate you met while out partying or a childhood friend, you both trust each other, enjoy spending time together and share everything (from a no-holds-barred love for ankle boots to girly weekends away and an unrequited love for Jude Law).

You basically get on like a house on fire and your life seems fuller because of your friendship. But deep down what is it based on, and what do you bring each other? Take our test to find out and to make even more of your closest friendship.