Is this normal? I'm confused?

Okay so my mum's uncle just died well we just found out about his ping, my mum isn't grief stricken at all...since she expected this would happen soon. My mum's aunt his wife is well crying her eyes out I don't know how the rest of the family is reacting to this. I don't feel anything, I was really close to him and I loved him with all my heart and he was a friend and a father figure to me. He was 79 turning 80 in September, He was very ill and actually in a sort of coma before he died and we all knew it was coming he had bone cancer, open heart surgeries, kidney problems...so very diseased old man, he was very kind and everything to me but I'm not upset, I feel fine, I mean I will miss him no doubt about it but I am no sad I am a little bit of course but i thought I'd be like drowning in tears, when I found out he was in the hospital I called my friend(whose now traveling)and I was literally pouring my eyes out until I didn't have any breath. Is there something wrong with me, do I have a heart made of stone or something because you know I figured I would be a wreck. Any personal stories please share I just want to know if it is normal that when someone dies this way why am I not pouring my eyes out