If he compliments your eyes, the color of your hair, your laugh, or an admirable aspect of your personality, then he's definitely flirting with you. He may even tease you a bit while flirting with you, like if he says something like, "That's the brightest sweater I have ever seen," but he's still flirting with you.
Notice if he becomes nervous or suddenly quiet around you.
One way to tell if a flirt really likes you is if he doesn't flirt with you. If he's a natural flirt, he's probably not putting too much thought into his actions when he's friendly with other people--that's just how he is.
Physical flirts are big on touching. They'll lean into you, adjust their stance toward you, play with their hair or put focus on their mouth—this style of flirting is sexually charged, to say the least.
There are a few dead giveaways that indicate he's interested. If he holds a hug for a super long time or he “accidentally” brushes your shoulder or touches you, he's probably into you. If he's just being friendly, he may smile and make eye contact, but he won't go out of his way to touch you.
If you notice he is making more eye contact with you or you catch a guy staring at you, he is probably attracted to you. He may be enthralled by your good looks and may be fantasizing about kissing you. Perhaps he stares at you and smiles; that could mean he likes you, too.
Research identifies five main styles of flirting: physical, sincere, playful, traditional, and polite. The physical style is associated with expressing interest through physical behavior.
In a research project, Jeffrey Hall, Assistant Professor of Communication Studies at the University of Kansas defined five flirting styles; playful, traditional, physical, sincere and polite.
If he compliments your eyes, the color of your hair, your laugh, or an admirable aspect of your personality, then he's definitely flirting with you. He may even tease you a bit while flirting with you, like if he says something like, "That's the brightest sweater I have ever seen," but he's still flirting with you.
Use open, interested body language.
Face your shoulders and hips towards him. Play with your hair. Make eye-contact. Nod and smile as he talks. Avoid crossing your arms, looking away/down, or staring into space as he talks.
They draw the line: Natural flirts know when and where to stop. They will not lead someone on unnecessarily or give them the wrong idea about their real feelings and cause heartache or heartbreak, neither will they come on too strong and make you want to run for your dear life.
Things You Should Know
She's definitely flirting if she looks at you frequently, teases you, touches you when she's excited or happy, or texts you random, funny things. She might be flirting if she laughs at your stories, calls you nicknames, makes up excuses to talk to you, or adjusts her body language toward you.
Guys tease and make fun of girls they like because they want to be noticed. Contrary to popular belief, guys always seek attention from girls—especially the ones they like. Guys try to hide the fact that they like the girl by teasing her. In a way, it's still flirting.
Maintain eye contact.
Normal eye contact lasts for about three seconds. However, if you can hold your crush's gaze for four and a half seconds, they'll get a powerful cue that you're flirting with them. You can even hold it longer, if you like, as long as your crush doesn't look away.
Subtle flirting involves using discreet, understated gestures or verbal cues to signal interest and attraction without being overt or aggressive. Subtle flirting can help create intrigue and maintain a sense of mystery during the early stages of a flirtatious interaction.
Innocent flirting is a lighthearted and playful form of social interaction that involves casual, friendly banter, compliments, and teasing without any serious intent or expectation to pursue a romantic or sexual relationship.
A good flirt cares for others —by listening to and showing interest in them—while simultaneously not taking their partner too seriously yet always appearing confident. In other words, successful flirting requires high emotional intelligence.
If someone smiles a lot when they look at you and connects eye contact with smiling, it is usually because they find you attractive. They might also make fun of you and tease you, or try to make you laugh. If someone's into you, you make them nervous. Their heart will beat rapidly from being around you.
You will often witness a spark in their eyes when they are looking at you or having a conversation with you. They will smile at you as if you are art personified. You can tell if someone likes you if you can sense them looking at you even when you are pretending not to notice.