lots of ways but it can depend on the age of the guy. how old are we talking about?
Tell him you already have a boyfriend and then just walk away. that simple
Girls can tell or know if a guy is gay by observing his behavior in a group of men.
Some girls will tell a guy that they like them while others may be shy and will not tell them.
touch him.
sorry, misread. I would just tell him straight "sorry, but I am not interested".
Some girls might tell the guy. Or some might be a little shy. Most girls usually keep quite so the other girls don't go crazy and tell everyone. But some are like me and if they like the guy they will start to hang out with him. Become his friend. And then they might ask someone to tell the guy for them. Alot of the times girls don't like to tell the guys. They think they will get laughed at by the guy and his friends.
There is no physical way to tell.
well she just feels it
He's going to be a guy. He's going to talk to other girls. You just have to observe how he talks to you versus the other girls.
It could be possible that the guys are jealous since the girls like your legs.
When he starts liking girls too.
Depends on the guy .