I'm kind of cool with it. My mother went two years ago this June, she was the the first major death that really hit me hard. I lost friends prior to this, grandparents, pets, etc. but when she passed I lost my shit for a while.
Two things about death bother me, the act of dying, and the concept of nothingness. To be honest, nothingness bothers me less than the act of dying. I fear dying, I hope it's not painful. After that, I am mostly at peace with it.
I rationalize it by accepting that I did not exist for 13.82 billion years, and I will not exist for 13.82 billion more years at the very least. That's scary as shit but yet comforting at the same time. I will die someday, as will my fiancee, my brother and sister, my friends, my dog, etc.
I love. I exist, I am.
I will die.