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

I am a junior guy in high school and have recently become interested in a girl.  2 nights ago she Direct Messaged me on twitter.  I didn't think much of it but we were talking about a sport that the both of us play and messaged for maybe an hour or so. But then, yesterday morning she messaged me again.  we live in the Midwest so we got a bit of snow the other night.  Her school got cancelled for the day but mine did not.  at around the time I got to school she Direct messaged me again. we direct messaged for a little bit and I ended up giving her my number. she texted me immediately. we then texted for the next four hours.  I have an interest in this girl, but, here is the complicated part, last time I checked she had a bf.  So I'm just not sure if she was texting me as a friend or if she is also interested.  The thing that I keep thinking about is that, if she did not have an interest in me, then why the hell would she wake up at 7:30 on a day when you have no school and DM someone that she has no interest in. And then text for another 4 hours.  This girl is really awesome and is definitely gf material.  But I don't want to read too far into things and make a move if she is in a serious relationship.  What do you think I should do reddit.  I would really appreciate any type of advice and am just wondering what my next move should be, and I understand if you don't care about a dumb high school relationship, but do understand that it's a big deal for me.
<bot>: I like a girl and we talked on a morning that she had no school and I did, so I think she has interest, but she may have a BF.