Seems Interesting .. Na?? Sometime it happens with me that i was having 456 friend yesterday and today I am having only 454. Then who are those 2 person or friend who rejected me?? I and You all like to track record for who unfriend you from your friend list. Many time happens that some friend accept friend request and then remove you from friend. They think that if they ignore request then you may feed bad. So, Here is one way to find who has unfriend you from their friend list.
There is one website call Twenty Feet.
Link :: Twenty Feet
It is simple. You need to connect your Facebook account with Twenty Feet and it will record all your current facebook friends. Now, When You will log in to that website, It will fetch data for that point of time and will give you notification for increase or derease in your friends.