I'm thinking of ending my life today and can't get over the guilt of hurting my sisters
What made  you think of your sisters?
I saw my sister's friends did the same thing to her past year.
It is normal to feel guilty if you hurt somebody but you shouldn't commit suicide because of it. It would be better to talk things out with somebody and then apologize to your sister.
I'm going to kill myself.
I think you immediately need to seek help. Please don't end your life.