Strange girl or me

Hi, Actually I Met A Girl during seat selection process so after few days i sent her request casually then she used to smile at me or ignore me whenever i see her but one day suddenly she insulted me in front of class and i found she did not came to class i felt bad i called her but again she did not talk further so i sent her messages so it makes her happy But she never replied to my messages i stopped her messaging but she again start behaving silly and she whenever looked me depressed and sad so i started messaging her again one fine day she talked to me even i talked casually i continued to message her but again she was ignoring now what the fun she was getting doing this i got angry And removed her from my fb account but she never used facebook since day i removed her i got worried so i went and tried to meet her friends and In front of other classmate convinced them if she loves me I will hold her hand.Now Suddeny She is happy And Back To Facebook But I don't Understand really what this girl indicates she as changed a lot and looks similar to me.I Feeling Happy She is back And continuing her life,.But i am not able to find why she interfered in all sigth.

just be friends with her try to know her.