how to know if someone is gay

Of course! What is your question?

Well, it's important to remember that everyone is different and there isn't a checklist that determines someone's sexuality. The most reliable way to know if someone is gay is if they tell you themselves. This is a personal aspect of their identity and it’s not something you can figure out from their behavior or looks.

If you believe someone is hinting at their sexuality, the best approach is to maintain an open and non-judgmental environment where they may feel comfortable to discuss their identity further. However, remember it's their decision when and how to disclose this information.