Be a woman of mystery. Chat a few minutes, then say "gotta run, talk to you later, sweetie" and hang up! Let him wonder why he doesn't have you and your time all to himself. Where are you going when you "gotta go"? Who are you talking to on the phone when you're not talking to him? Men love a mystery, so give it to them. Keep your phone calls short and sweet and he will never get tired of calling