I think I'm going to ditch my friend because she invited someone I didn't want to bring along.
Why did you not want that person to come?
Because she never listens to me and I hate her now.
Have you talked to your friend about why they invited this person? They should have checked with you to make sure that everyone invited would get along, but maybe there's an important reason this other person is coming.
Maybe there's a reason, but I hate this person.
I understand that that's a frustrating situation, but you should really talk to your friend so that this doesn't happen again. If your friend doesn't know how upset you are, then she won't be able to make things right.