I'm a Villainess, Can I Die?

My sick brother died so my usefulness is over.
With that I choose to die,
but I became a villainess in a third-rate novel?!
In face of miserable end, I thought I can end this troublesome life with my own hands…
But why do they keep trying to save me?
“Don’t take your partner status from me, Selina.”
“Can you dare to be greedy?”
My life is getting better and better, and the day I will die is coming. What should I do