A friend

So i have a friend who is obsessed with guys and she likes this guy but at the same time she thinks he always stares at but, in reality he doesn't even know her. My friend makes up stories about him staring at her and its obvious she likes him, because she tried to introduce herself to him. She is always trying to get attention from him. She always asks me wether this guy looked at her, and even if i say no she thinks yes. She is getting false accusations and i wanna help her but she wont listen.

What should I do?