men and women will never know just how many people are interested in them, how many men have looked at a woman and thought, 'yeah'!! about a woman ...and done bugger all about it? massess! and we are supposed to be the confident ones!
women are similar, only its the guys job to approach, if he doesnt, she assumes he isnt interested and keeps shtum!
its up to the guys to pick up the clues, sometimes these are soo subtle they go unnoticed, i.e. bumping into you or brushing against you...'by accident'.
always assume a woman is interested until she states otherwise, its up to you to be proactive and more efficient