<human>: Can you condense the text into a few key points?

27m/22f.  Lady and I have been dating for the past four months or so.  About a month ago, we established that we would be friends with benefits.  (intimate/sexual, but not exclusive, and not in a serious relationship.)  Since then, it seemed as though she was developing more serious feelings, inviting me to meet her parents, coming to me for emotional support during heavy times, loading me with compliments and adoration.  This past weekend I met her family, and the last thing she said to me before I left was that I was the only guy she's hooking up with.  

Next day I text her that I too am only hooking up with her.  She responds with "But you're not refraining from hooking up with other people are you?"  I ask her if it's bad that I only desire to hook up with her right now, she says it's "not bad, she just wants to make sure we're on the same page."  She follows this up with "But you're the only guy I fantasize about before I fall asleep."  I feel confused and awkward now.  The moment I reciprocate her vibes, I feel like she slams the brakes and I've screwed it all up.  Wtf is going through her head?
<bot>: Girl seemed to want more than friends with benefits, until I seem to want it back, upon which she becomes cold and distant.