Why is my gf gay
She needs to be shown that she’s participating in harmful stereotyping that keeps a lot of men from being comfortable having close friendships, and ultimately hurts both you and her. Tell her that you’re comfortable enough with yourself that if you were gay, you’d just be gay (assuming this is true.).
Understanding the nuances of sexual orientation and recognizing the subtle indicators that may suggest your girlfriend’s potential homosexuality can help you navigate this journey with sensitivity and empathy.