Life events will change you, but you have control over how they change you.
I'd planned to tell Mom how much I loved her, but it was too late. I swallowed the lump in my throat and instead all I could hear myself say was, "Mom, I can't look at you, because if I do I know I'll lose it." We took one step, then another, and walked what I didn't know would be the last walk we'd ever share again. And just like that, she gave me away.
I don't think there is anything that can prepare you to lose a parent. It is a larger blow in adulthood I believe, because you are at the point where you are actually friends with your mother or father.