You're not alone in this.
I don't miss anyone either. Old friends, well, never really had any best friends but, acquaintances, relatives, anyone!
Even parents. I cared about my mother a lot, but after she died, I can honestly say, I didn't really miss her. Seems strange, as I think about her almost every day, but I still don't miss her.
I actually feel bad about that, that I don't feel anything for her, or for other people who are gone, but it is what it is I guess 
_________________
AQ: 42
EQ-60: 3
Aspie: 147
NT: 54
RAADS-R: 186