it's normal. just because she's most likely telling you she isn't interested, that doesn't mean you can simply just stop harboring feelings for her. if I were you, personally, i would avoid her from now on. you're only going to hurt more if you find out she actually is interested in someone else. unless you're friends... then for the sake of your friendship, you're just going to have to get over it.

I think its called irrational selfish foolishness.. don't tell people you love them if you aren't even friends.. thats just cringy ..

Give her time... Good luck