I was closet bi

I was 16 my first time with a girl after her I only was with men until I was 18&21 I was with a girl agin I never told anyone my family would not have agreed I’m now 25 and I have came out I no longer keep it a secret that I like or have been girls before I’m separated from my ex and I’ve been trying to date girls but they think it’s just a faze it drives me crazy that they don’t believe that I actually like girls like how does someone get to decide what I like