A girl grabbed my...?

You need to keep a distance from her, and try to avoid her if it is annoying you. She probably really fancies you, but is obviously showing it in an unusual way, and doesn't realise it's scaring you off! I reckon she thinks she can keep you hanging back for as long as possible, to see if you react and make a move towards her. She probably thinks or maybe just wants you to like her back, and so is playing hard to get in.. a physical way