This girl baked me cookies and now I'm going to ghost her.
That's a shame, why would you treat her that way after she was so kind to you?
I don't feel anything for her anymore.
It's rude to cut off contact with someone without any warning, especially if they seem to like you so much.  You should think of her feelings, and if you really don't want to see her anymore, at least let her know why.
She keeps calling me and asks me to hang out. I'm just not that into her anymore. And I have my limits damn it.
It's fine to not being interested in someone, but ghosting her is rude and disrespectful. How do you think she's going to feel after you end all contact without any explanation? You should be more mindful of the feelings of others.