How do you know if a guy whos naturally a flirt likes you?

If a guy likes you, he doesn't flirt with you because he thinks it will make you not like him. If he flirts with you, he only likes your body. If he likes you, he'll just be nice. That doesn't mean if he ignores you it means he likes you, he hates you if he ignores you. He has to be NICE to you. And don't think that that's not true because you don't do that. Girls don't usually flirt so it's the opposite with girls.