I hate to say it, but always make them chase. Men are built for the chase, and if they are truly into you, they'll realize that you're worth it and they'll wait for you. Err, as in wait for a woman who wants to take her time and not jump into something sexual right away. If a guy isn't into you, he won't chase for very long as he'll see other women out there who will give it up easily and then he'll be gone. No sweat, because there ARE decent men out there who will go at your pace and treat you right!