Um.. Hi.. How are ya???

Okay, so everyone knows I love some facebook.

I resisted joining at first and I'll tell ya why. I wasn't the most popular kid in school. Not everyone knows this, but I was on steroids.. Not by choice..
For medical reasons I had to take prednisone for several years of my teenage life.
In case you don't know, steroids make you crazy and uh, how do I say this gently "bigger". Not only does it increase your appetite, it also causes cushings syndrome.. Which is a big round "moon" face, that matched my big round "moon" ass.
So add to the fact that I looked weird (moon face has a different look than just a chubby face), steroids totally changed my personality (as it does with most people). Bad choices, resisting authority, bucking the system, I usually felt like I didn't fit in or wasn't really noticed. I ate lunch alone or stood across the street with the "hoods". I spent much of my school days hanging with Mr. Rottman or Mrs. Chambers. But mostly struggling with the fact that the image I was portraying was not who I really was inside. But I couldn't seem to stop the effects.

None of this is really the point. The point is, I didn't want to join facebook because I figured no one would remember me and my only friends would be family.
I was afraid to send friend requests for that reason.
But I started getting friend requests that really surprised me.. It was kinda cool.

I kept track of how many friends I was actually getting. And got to build relationships with the people I so desperately wanted hang with in school. I'd like to think people got to know (and even like)the person that was hidden inside of me for all those years.
Then I got unfriended. Ouch.. I noticed the drop in my friends, but it took a couple months to figure out who it was (apparently I didn't really miss the updates from that particular friend).
So here is the point. I see the person that unfriended me, more than just occasionally. We never chatted on the phone, or had a girls night out. But we spoke about the things we had in common, had friendly conversations, said more than just "hi" in passing.
We know many of the same people and run into each other when we go "out".
So what do you say when you run into an unfriend? "hey" "how are you?" "whats been going on?"
Or "WHY THE HELL DID YOU UNFRIEND ME? DID MY BREATH STINK?" and to continue "if you hadn't unfriended me, I would know how you are and what's been going on".
So readers, I pose this question.. How do you talk to an unfriend when you both know they're an unfriend?