If he is a player and plays with your feelings it means he is not serious about you. This person does not sound like a friend either, because a friend would not play with your feelings. Women sometimes get crushes on men who manipulate their feelings or exert some kind of mental influence over them. If you want to stop liking him you'll have to think about the ugliness behind why someone would treat a person like that. It tends to be pure ego and a power trip. Often you can't stop yourself from liking someone but being aware of their negative nature should help you make a smart decision so that you don't get involved with him.