Empathy

Try not to judge people as callous and insensitive when they are reticent and quiet. You don't know what they have been through and what they are going through. What you may perceive as lack of emotion/feeling, is them trying to survive, trying hard not to lash out at this lying, cheating, hurtful world. You don't need to be their solace, but DO NOT add to their burden. Because, their most prized possession is their peace and sanity and when pushed past their limits of tolerance, they will have no qualms shutting you out, even if you are their best friend or their own blood. They are lone warriors.

Not everyone should conform to your definition of 'normal'. Please make this world more empathetic by being understanding and if possible, accepting that a person's demeanor is not intended to hurt you. Don't put that guilt on them! They might be waging wars with their demons, let them be. Be kind or at least get away from their path.

Survival is their primal instinct, and don't let that hurt your feelings.