Girls, Why does she's always jokingly call me names?

Keiran1995
ok so I tried to add this girl , she didn't accept and kept staring at me down canteen. So turned out she in one of my lessons two weeks after so I introduce to her and her friends. So after that in class she would always look me up n down n tease me by asking me everything I do. So I Jokingly asked her number which she gave to me and ever since we text about work etc. I always call her sweety n check how she is. But in class I joke around with my friends n accidentally ignore her she tries to grab my attention by calling me random names. And she always goes quiet if I talk to other girls
Girls, Why does she's always jokingly call me names?
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