I’m a Villainess, Can I Die?

My sick sibling has passed away, so I don't want to live anymore. With that, I chose to end my life, but how did I become a villain in a novel?! Facing with such a miserable end, I thought I could end this troubled life with my own hands... But why are they still trying to save me? "Don't deprive me of your partner status, Selina." "Can you dare to be greedy?" My life is getting better and better, but my death day is coming nearer. What do I have to do?