Is this normal or a problem?

When someone dies I don't cry except certain times. I'll explain in the past when my grandpa on my dads side of the family died I didn't feel anything, everyone was upset, I just said dam, and forgot all about it. He was suffering so he needed the relieve, but still. My aunt died, unfortunately forced to go to the funeral I felt very uncomfortable there. I seen her all the time, but I never anything. Once my brother lost his ex wife and the baby during her pregnancy, my dad cried like hell, I no my brother did to. This stuff that I mentioned happened when I was kinda little. Plus I didn't see any of these people alot except for my aunt. I did jot hate these people its just hard to really feel like everyone else.Recently my friend had diabetes and he was almost at death. My other friend had called and told me, and I was thinking to myself alright plz hang up the phone. He's not dead though. I cared about my friend we go to the same school, sleepovers, video games, known him since 3rd grade, but the thought of him dieing didn't bother me at all. Now currently my grandpa on my moms side is I believe is dieing aswell as my grandma dads side is dieing to. Now my grandpa kinda bothers me a little, because I see him more. When my cat died when I was little I was devastated, if my dog died id cry for a year probably, samething with mom and dad, and my grandma on my moms side, or my other friend if something happened to her id cry. ( she's not my girlfriend right now ). But yeah is this wrong?