<human>: Can you provide a brief overview of the text?

Okay so here it goes.  A girl and i have been good friends for a while now (lets call her m).  m and i became great friends about 4 years ago. we dated about a year later for maybe 3 weeks but broke up because we both admitted we weren't really ready for a relationship.  

In the middle of the last school year (freshman year of highschool), we flirted a lot but she rejected me and just wanted to stay friends.  2 weeks later, she reconsidered and asked me out. we dated again for about 3 months and got as far as about making out, but broke up because of busy schedules (I am on my school swim team and she has volleyball stuff). we stopped talking for a while after that but began to again at the beginning of our sophomore year.  

 during sophomore year, we flirted a lot and she texted me literally every single day.  i asked her what was going on and if she was into me and she said no. we stopped talking for about a month and then she started texting me daily again.  We hung out a few times like i would go to her house for dinner and we would go to the movies sometimes but i was not sure if she was into me.  last week, she invited me to go see World War Z and then to go to her house and watch a tv show that we both like. i could not go to her house but i did go to the movies. i could not help myself because it seemed so much like she wanted to date again so i straight up asked her if it was a date (i know) and she said no.

Someone please explain to me what is going through her head.  If she doesn't want to date i get it but she makes it seem like she really does, sending me selfies and stuff like that all the time.
<bot>: Girl is extremely flirty and seems as if she wants to date but does not actually want to. Why does she do this / Help?