Show the guy the competition
Don’t ignore the other guys because this one is giving you attention .When you make a guy feel that you like talking only to him he will assume he has won you over.Talk nicely to other guys and flirt with other guys even if he is around.Just remember you are not dating him still so let him know there is a lot of competition in your dating market .The more the competition the more he will respect you and try hard to woo you.