You ask them. And if you don't know them well enough to ask, it's none of your business.
Guy: Hi!You: i'm gay.
Kiss him.
Girls can tell or know if a guy is gay by observing his behavior in a group of men.
There's no better way to find out than ask the guy if he's gay. That way you will know and can move on if he is gay.
You f...ing ask him!!!
You can't. There's no way of knowing if someone is gay unless they let you know, in some way.
you ask him
The only way to know is to ask him.
You can tell that some guy is gay by asking him his best friends, and by observing his behavior about other men.
ummm ask him?
Just ask
proof it baby proof it!!