Relationship question..?

GUYS ONLY plz. I met this guy on line, we've been talking for while now have not met eachother yet. He calls me at least 3 times a day. Even when he's on a break or something. I always pick up the phone. I love talking to him. But I wanna play harsd to get. Sometimes, I just don't wanna pick up the phone but I like talking to him a lot that I can't loll any ideas? Thanks