Did you ever think that you don't feel any affection when someone or anyone you are close to die? Because i did, when i first experience someone i am close to die i did cry and felt sad about it. But then, again someone i am close to die, but i didn't feel anything, i just shrugged and in my thoughts " it's fine this was a normal thing and everyone experience the same thing".
When i see someone's love ones die, i didn't care about it and again i was thingking it was just a common thing. Even though i see them crying, i just did nothing, i watched them in the corner and thingking nothing. I see others crying at the view and they feel pity to the bereaved family. But i was just looking to all of them and i don't feel anything because i felt like it was just a common thing that happens in our lives.
I gradually became affectionless as time passes by, i always experience someone i care the most dies, i always saw how they die, what they felt before dying, their expressions, and how in vain they were. I become affectionless because i saw many deaths on my own eyes, i saw how they suffered from their cause of deaths.
I think it is something normal among human beings. There is a reason for experiencing these changes. Affection is not always the same, we should not judge ourselves for that. Everything that is linked in a special way with each one of us will cause emotion. Love, in my opinion, is the main cause of everything.