How do you flirt with a guy without being obvious?
Make eye contact with him.
This will show that you're engaged and really listening to what he has to say. Listening to him, and showing that you're interested, is an easy way to flirt without making it extremely obvious. Be prepared to make a lot of eye contact, especially if you haven't talked to the guy yet.
When you spend time with someone and share vulnerabilities, it's easy to develop feelings of closeness and attraction. These positive feelings can develop into a crush, even when the other person is romantically unavailable. Traits such as kindness, intelligence, and a great sense of humor can fuel a crush.
How can you tell if someone likes you but doesn't show it?
Notice if they look for attention.
Someone who likes you may do something to have you notice them. Watch if they talk louder when you're nearby, or starts laughing with their friends when you're around. They may not talk to you on a social website, but they'll "like" a bunch of things you do online.
Men who are interested in you will likely face directly toward you during conversation. Even if you're with a group, he might turn his whole torso to face you. Watch to see if he's trying to “close you off” and keep you to himself.
Ask him stimulating, interesting questions; find out about his life, his family, his friends; tell him funny stories. ...
If you can get the guy talking about something he's really passionate about - whether it's a favorite sports team, band, author - then you're on to a winner.
Men love women who are thoughtful, caring, loving and kind. A woman who does little things for her man for no other reason other than that she loves him. A woman who makes him smile back whenever she smiles at him. A woman who radiates love and warmth from her heart.
Sexual compatibility is one of the top reasons a man chooses a woman over another. Many men prefer a woman that matches their sexual styles. These styles may include her moves, the way she kisses, the way she dresses, and so on. Understand that she might not even be as beautiful as you are.