This is ridiculous. If you play games like that, then you are looking for a codependent relationship. You are seeking to enmesh with the other person, making them feel needy and insecure and then showering them with love so you can get high on it.
If you do that during courtship, then you’ll probably do that during any ensuing relationship, and that will suck. If you manage to survive until marriage, you can expect lots of periods of misery.
Your friend shouldn’t play games. If the boy she’s interested in plays games then she should get away from him as fast as possible. Relationships—at least healthy ones—are not about games. They are about two people coming to trust each other enough that they can be emotionally intimate with each other.
Playing hard to get is the wrong foot to step off on.