How do you know if you're really gay?

How does anyone know anything for that matter?? I know the obvious answers, I’m looking for answers for someone who has had about as many female partners, as male partners, and doesnt feel like he fits on either team. What to do about being undecided sexually. I think this person would be really happy with a girlfriend, but he’s kind of a bad catch. He’s a bit nuts and he’s poor, but he’s good looking and kind. What to do…