You are
flowers.
If you are scorned and wrathful
I will die for you
People often give flowers to a significant other who is angry at them, as an apology.
If you are full of bliss
I will die for you
Flowers are part of many special occasions, weddings in particular. ("Wedded bliss")...
If you are wrecked with grief
I will die for you
Flowers are also a traditional part of funerals.
I am loved. I am cherished. I am adored. And so, I am murdered.
People love flowers, and to give flowers they must be cut from their plant — that effectively kills them.
Hint:
I am rarely murdered by myself. Typically, my family and my friends are murdered as well.
Flowers are rarely given individually; they're usually part of a bouquet or floral arrangement.
Title:
"She loves me ... she loves me not ...."