Do you want to know who is truly the peanut butter to your jelly? You know, that one person in your life that complements you so wonderfully, so perfectly, that nothing else can take its place? That one person that - when you're together - is like a beautiful symphony that can change the world with its harmony? Let's use our delicious Upfriendly PB&J-gorithm to scan your friends, their profiles, and your relationships to determine - once and for all - who is truly the peanut butter to your jelly! Go!