pak-one, if you really aren't interested then you need to just cut off right now. Don't communicate with her further, at all. She is clearly interested and any response from your part will suggest some possiblity.
You probably don't want to hurt her feelings but you wil not be doing any favors to her by talking.
You'll get over it.
Buttttttttttttttt, if you think she's nice, I say go for it. Why should you be so rigid? You don't have to do anything unethical or wrong.
This.