I'm really just so confused and need help.

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I don't know why, but I feel the need to keep posting this since I'm not getting many clear cut answers here.

>Girl rejected me Mid-May
>Told me she wasn't able to "have feelings for someone right now" since she was "on emotional tilt" cause her boyfriend cheated on her around the beginning of March.
>Not entirely bullshit cause she rejected like 3 other guys and asked me for help rejecting another one at this point
>I talked to her for a week after, had a major crush still so it hurt, and broke off contact almost 100%.
>It's been 3 months of no contact, from mid-May to last week.
>Check facebook cause I have 5 notifications - all are from her
>She's messaging me now the rest of the week like first. Not blowing me up, but enough to show she seems to want to talk I think

She's never, in the entirety that I've known her, texted or messaged me first, it was ALWAYS me. I'm caught off guard because all these messages I'm getting are from her first and seem like the sort of messages I'd use to find an excuse to talk to her. "Hey did you hear so and so is teaching this class? Hey dude I just did X what are you doing today?" sort of messages. What catches me even more off-guard is that I'm being cautious with this - I'll respond half-interested with "Oh cool!" or "Hopefully that class isn't too much trouble." She'll respond 5 hours back with little to no interest, so why the fuck is she even messaging me in the first place? And before you go "lol attention", she's got like 7 guys who loyally follow her around everywhere, so she doesn't need attention from me - she didn't need it for 3 whole months.

God I hate this, I spent 3 months getting over this crush and this girl is creeping back into my head almost immediately just by sending me a facebook message.

What do I do, I need help :(