
You know honestly that's how I was too at one point, well two points in my life actually. When I was 10, I was devastated when my late grandmother (may Allah grant her jannatul firdaus) had died. I didn't even understand the whole concept of death, and it was just hard because I wasn't even allowed to go to the funeral. I was just feeling so lonely when I was a kid, about to go to middle school and all of a sudden it was like I just couldn't deal with it at all. I had such a close relationship with her, she was there with me throughout my childhood. At one point I was even under the impression that she was my mother. :-[
Earlier this year my other grandmother had died as well, my grandmother's sister (the one I was talking about earlier, may Allaah grant them both jannatul firdaus). Both of them died of cancer, and their other sister had also died in 2004 of cancer as well. Really sad wallahi. But this incident was particularly hard for me because I was just beginning to have such a close relationship with her, she was such a cool grandmom mashaa'Allaah. I was visiting her every weekend and days off of school and stuff. And then two days after I had seen her, she was in a coma, and then she had died. You could imagine how I had felt, I was about to get married too and I was looking forward to telling her but I couldn't bear feeling happy when my grandmother had just died.
So honestly, that just reminded that ''kulu nafsin daa iqatul mawt'' (every soul shall taste death) and that we should live each day like our last. We shouldn't feel overtly happy, but grateful that we've been given another day to live. Do not dwell on small things but rather be happy that Allaah ta'ala has given you so much and that he asks for you to pray only 5 times a day.
When such instances occur, they are only reminders for us because the same thing will happen to every soul at one point or another. The only thing we are really sure of in this life (besides Islaam) is death. It is unavoidable.