Old "friends" -- a rant

So I find myself with a dilemma.

I've really enjoyed re-connecting with high school friends on Facebook. Some of us even used Facebook to set up an actual PHYSICAL meet up when I was back in California in May.  Fantastic!

Every one of them so far has been someone who I just lost track of, as I went to college and changed who I was.  (Actually, my therapist says I left high school and that little town and actually became who I was meant to be... but I digress.)  It's been really cool to see how everyone turned out.  And I"m so glad that everyone is happy.

I admit there have been a few people who I have ignored because we weren't friends or even know each other in high school.  (I mean REALLY, why start now? I'm not here so you can increase your friend count on FB.)

Now here's the rub... recently I was approached by someone who I had been friends with... really good friends, back in the day.  But we had a huge falling out second year of college. Since that night, I haven't heard a word from this person -- no call, no email, no letter, NOTHING. (This despite the fact that all information is readily available AND that my mom does business with her dad.)

A few months ago I received a friend request on FB.  Figuring to avoid an uncomfortable situation I hit "Ignore."  Today, I received a message in my FB Inbox asking why I haven't accepted.

Do I:

1) Not reply and hit Ignore to the friend request?
2) Reply with an explanation of why I'm not accepting the request?

All of this is pretty far in the past, so I don't want it to seem like I've been thinking about this all these years.  Maybe I should let by-gones be by-gones.  On the other hand, I do remember the falling out and I just figure we aren't friends.

Hmmm, with that last sentence, I think I just solved my issue.

What do you think?