The best way to tell if your friend is gay is to ask them. But you should be cautious about bombarding them with personal questions about their sexual orientation unless they are ready to share. They may be uncomfortable with this, especially if their partner is closeted and they don’t want to come out to their family or friends.
Another sign is if they’re openly supportive of the LGBTQ community or their friends. They might have photos of them and their friends on social media with the hashtags #loveislove and #pride. They might talk about their LGBTQ friends with you or joke around about them being gay.
You can also look for hints that they might be gay by the way they talk. If they use feminine pronouns, or if they’re not interested in talking about women the same way they are with men, this could be an indicator. Also, if they talk about their past hookups with men or the women they’ve been with, it might be an indication that they’re gay.
Lastly, pay attention to their body language and their facial expressions. People who are gay often speak with their hands and their eyes, and they might have a more feminine walk or body shape. They might also have a more feminine voice or a more feminine way of speaking.
But don’t use words like “faggot,” “dyke,” or other derogatory terms when referring to a person who is LGBT. These words are hurtful and can cause your friends to feel ashamed about who they are.