Do You Take Back Deleted Facebook Friends?

I received a Facebook friend request yesterday from this guy, but we were already friends on Facebook!

This made me wonder, did this fool just DELETE me one day and then decide later he wanted to re-add me?

Or, did he 'accidentally' delete me and then realize his mistake?

Or, did he just start a new Facebook account and wants to add me to it?

I guess the most important question is, should I even accept this person back into my Facebook life? What would you do?