She seems interested in you but she might have not courage to move toward you openly. However, being a woman she did what she could have done to prompt you but it is you who failed to take hold of the opportunity as a result she might have changed her mind to be intimate with you so she pulled her back when you tried to touch her boobs while touching her feet.
However, she did not say anything to anyone about your delicate behavior towards her so consider it as a positive sign from her side.
Next time, when you found her alone rather than sending indirect hints approach her promptly with your actions. Like holding her firmly and start kissing her unexpectedly.
I am sure she will reciprocate you and if not then stay away from her. Before approaching her, you need to make sure that there is no one around her so she can contentedly react to your conduct.