How do I reverse the process from talking stages with a girl even after we did it the nicest way possible? Is saying never mind ever nice?

I feel so bad but I have changed my mind. It’s going to look like I’m leaving just because I already did it with her. How do I put out this fire?
How do I say never mind?
How do I reverse the process from talking stages with a girl even after we did it the nicest way possible? Is saying never mind ever nice?
How do I reverse the process from talking stages with a girl even after we did it the nicest way possible? Is saying never mind ever nice?
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