what if sasuke

[ichigo uchiha 1992]

Doesn't show any emotion to Sakura or sarada because he has come to realize that when ever he starts to love somebody he always becomes a freaking nut case.
1.parents murdered
Becomes obsessed with killing brother
2.itachi dies
Destroy the leaf
3.itachi dies again
Kill naruto steal his dreams
Obviously I'm not listing all the Wack job stunts he's pulled but you seem my point

 

[Filosoofis]

When Sasuke cares for someone he really does with all his heart only an uchiha can love someone that much especially Sasuke with the uchiha massacre. So he is does but just really careful