Why do girls try to make guy jealous?

Anonymous
A girl I use to have a crush who now has a boyfriend who isn't me, is trying to get me jealous. She giggles all the time when she talks to him on the phone. Then looks at me. She was playing a Facebook game against him and kept saying ugh I wanna beat him. Keeps saying other guys names. I'd assume friends. We work together me and her. I did ask her out and she said no. Why is she trying to make me jealous? I'm not at all jealous just annoyed. I ignored her a little and she didn't like it. I've caught her staring at me. I don't understand at all, she's got a boyfriend. If I had a girlfriend I wouldn't be doing this.
Why do girls try to make guy jealous?
5 Opinion