What if a shy guy shows interest in you but only wants to be friends?

I don't think that most shy guys who get up the nerve to show interest just want to be friends. Take the initiative yourself if you like the guy to go to the next level. It might be just the push he needs out the door. Just be gentle if you find you don't like the turtle after you get him out of his shell. Otherwise, some lucky gal down the road might miss out on a great catch.