I'm not going to fix a bad friendship
Is there some kind of problem with your friend?
Yes, she wasn't able to keep her mouth shut.
You should try to resolve the issue you have with your friend. There might be a miscommunication happening between you two. Find out why she said what she said.
I'm not interested. I'd rather be friends with other people instead.
You have the right to make that choice for yourself. Sometimes it's better to move on from bad friendships.