Shoulder lean is a signal ... hw bout this one????!!!?

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hottest in class, happily comitted to a boyfriend, guys in class in love with her ... early last semester she leaned on my shoulder 2wice in the middle of lecture infront of classmates ... i didnt react to any of the attemts cuz i didnt really know what to do bcoz of her comitted situation ... and that i was working on my crush ... after that she made a gap and made it wider and we had argue several times but she quit it to somehow avoid this gap getting wider ... and now sometimes she is nice to me sometimes otherwise ... can somebody explain the situation to me again and tell me where is ma position in it... girl and experienced guy oppinion!!!!plz!!! ... btw that crush thing didnt worked out ...