I like her, she knows, and she acts like this. iin?

(warning, long read)
So, I met this girl at my college one day after she decided to walk with me and a friend. We'll call her N. She's Christian, moral, and innocent, like, 'sex-jokes make me uncomfortable innocent'.

Through a lot of one on one time over 2 weeks, we went from acquaintances who walk around the campus and talk about our romantic/social lives/past -- she had a 2-yr boyfriend, whom she broke up with recently due to his lying and unreliability -- to lying all over each other on our dorm lobby couch or under the stars until 11 PM curfew, playing in each other's hair for hours, giving each other back massages, talking very openly, and sitting far closer than platonic friends should according to my ex ("If I didn't know you, I'd think you were dating."). Said ex says this now that I'm tentatively dating another friend of mine.

Even knowing this, N makes a point to play in my hair a /lot/, has taken care of me when I was drunk, spent a good deal of time placating me with hair-play and back rubs, always laughs at my horrible jokes, verbally appreciates my "gentle" massages/hair-play, falls asleep in my lap/arms in public, and sometimes brings me along to Christian functions, the last of which she spent most of the time stroking my hair during. When we watch the stars at night, it usually entails her snuggling me, her head on my chest, giggles, hair stroking, and blushing. When pressed, "Miss me" or "You've got a crush on me, don't you?" N usually responds, "I'm not saying anything!" with a blush/laugh, and has said things like "I wish you were here to play in my hair" (text) and "I almost wanted you to kiss the back of my head" while rolled up in a blanket as I was teasing her at night during one of our star gazing sessions.

But it wasn't always so. The first time she laid her head on my chest, she became upset because it "reminded [her] of [her] recent and only ex-boyfriend." Same with the massage. I suspect she may be leery of intimacy. With me, it doesn't seem to be the case now after some gentle, subtle coaxing and trust built. However, for such a transition to happen so quickly -- when before she was stiff as a board and became easily upset but now voluntarily plasters herself all over me and seems to escalate the affection with time -- what do you think?

Is this normal from a platonic standpoint, or does she, as I suspect, possibly reciprocate feelings for me but is repressing them or delaying confronting them? Other than some hang ups, she's very sweet, fresh, honest, and genuine. Is she just shy?