Is she interested or ******* with me?

She's always with her friends, and when she's not she's on the phone. I see her staring at me at lunch, but she's always at a distance. Wednesday she was with this guy (looked liked she was trying to make me jealous). Then Thursday after school she walked ped me, she was on the phone. She looked happy. Then outta nowhere she did a twirl (WTF)? What is she doing?