Real talk though. insecure women do this crap all the time too. They will say something to you, then pretend to someone else they didn't say it. and honestly it could be an office joke which makes it even worse. that means you got a bunch of ADULTS using it to pass time through the day.
I'm going to shock you right now.... she's probably told people you've asked her out... numerous times...and she's told you no.... numerous times.... she's making you look bad and she messes with you because she gets off on it.
Just chill out man. enjoy your life. Let her not get her giggles off you and mope around. that's a reflection on her. nobody can control your emotions, but you. the proverbial you.... meaning everybody...well you get the damn point.
I am a horny guy... Don't know which one that is.... but its probably a combination because it's a slight level below addiction.... and I'm in my 30s.... it was past addictive in my 20s lol so I guess its a decline.