The 'ol telephone question.?

I am friends with this man who can't live with me nor can he live without me kind of thing. He calls me more than I call him but for some reason he does not like it so much when I call him. Recently while we were having a picnic the held me and said, honey please let me call you..don't call me (hangovers were the only mention at the time). I did not want to go into detail because I refuse to get heavy on a summer picnic. He is quite demanding and when he wants me I always come running he loves to drink and he leaves many messages. He gets angry when my answering machine is on but yet he does not want me to call him? What's up with all this?