Could have just did it cause she didn't want to be bothered. Some women would rather lie then actually say they aren't interested.
I dunno bro, if a woman rejects me, and puts "in a relationship" on purpose, my feelings would wound. I had this happen a few times, its not fun.
Before internet, it would be in your face.
I was interested in a girl in high school, she pulled the same stunt. And as she gets into the car, she flips me off. Cold. I get trying to be nice, I get it... but that attitude black pills me and I act cold to women sometimes. Its because of people like
that.