There is no real way to tell if a guy is gay. The concept of having a gaydar is pretty silly and most guys don’t go out of their way to make it obvious that they are gay or even interested in men. That being said, it’s important to be aware of the signs that he may be gay so that you can have an open and honest conversation with him.
If he talks frequently about his gay friends and seems to be attracted to men in general, that’s a sign that he could be gay. He may also seem to be more comfortable discussing gay issues than most other people his age. Another potential sign is if he talks about how he has had several threesomes with men.
Watch to see if he compliments other men often and flirts with them when they are around. He might even try to impress them with his sense of style or how he grooms himself.
Lastly, keep an eye out to see if he tends to be secretive about his social life or becomes evasive when you ask about the people he spends time with on the weekends. This behavior could be a way for him to conceal his relationships with other men from you.
It’s also important to not judge him based on things like his voice, walk, TV and music preferences, or how well he dresses. These things have nothing to do with his sexual orientation and many straight men exhibit them as well.