Lack of empathy for other losses

Oh, your dog died? And that is the WORST thing to ever happen to you?

Oh, your great grandma who was 95 died after living a full life and without losing any of her children?

Oh, your 70 year old mom died of cancer and you're literally 45 years old? So like, the natural course of life?

All of these things...make me feel completely numb. Like stfu. I was never like this before I lost my much younger brother to suicide. Now, I have no empathy for people losing pets or grandparents. Even adults who lose parents to natural causes make me cringe with anger when they expect my sympathy.

I hope I move past this and it's just part of the rage/grief. It's been 8 months.