What is going on in this girls head?

Ok so she texts me CONSTANTLY and she puts a whole bunch of winking smiley faces and stuff and i just met her thursday night and we hung out til like 3 in the morning. We have hung out every single day after that, but she has had a boyfriend for 8 months. When we were texting she said, "if my boyfriend has a problem with me talking to you, i would leave him in a second." I dont really have that much experience actually dating girls. usually its just a hookup or we are just friends but it really seems like she likes me. I rented movies and she was hinting for me to invite her over to watch them with me and things like this. We have a crap load in common! it is almost scary how many things we have in common, she plays softball, and ive played baseball my whole life, although we do go to different schools, but idk its just weird to me that she has had a boyfriend for 8 months yet is so flirty with me, maybe she isnt happy with her boyfriend? but then on facebook she posted, "going to reno only going to miss my baby and my best friend!;)" i have known her 3 days... So yeah. idk maybe a girl could yze what is goin through her head?