Being witty
Guys like witty girls. Women who are smart, intelligent and educated are adorable. They make you think and reconsider your own points of view. Your conversations become deeper and more interesting for the two of you. Do not be shy and show how bright your mind is.
Letting him call you
Clingy girls are less attractive to males. We sometimes make the very first move and call the man we like. Of course this is normal. But it would be great if you allowed the guy to be the first to dial your number. If this happens, feel free to tell him that you are very happy to hear him and talk to him on the phone. This will make him feel wanted.