If a friend holds the idea of a game world, she will not be sincere to anyone. This is just his way of life. We don't blame others' position. Private life is others' privacy. If you persuade him, he will think that you have invaded his privacy and the relationship between the two people is not very good.
We should understand that when a person's behavior does not harm society and others, it does not betray your relationship. Then his behavior is just his personal way of life. Her private life doesn't affect us. If it does affect her own health, you can give her some advice appropriately. If she doesn't listen, it's nothing. Never interfere too much in other people's lives.
Never judge a person, because we don't know what she has experienced. Maybe he was disappointed in his feelings. Maybe he has been deeply hurt. We shouldn't judge a person's character by his private life. Similarly, we should not interfere in other people's private lives. If we don't like it, we can stay away from them.