Can I be straight and gender fluid?

I came out to my girl friend as gender fluid. She didn't have a problem with it which I was relieved about. Everyone else had different opinions. My dad, brother, and friends keep saying I'm bi or gay. Info enjoy painting my nails and stuff but I don't find men sexually attracted. I'm only attracted to women. Yes I enjoy painting my nails and dressing a little feminine sometimes but I'm not sexually attracted to men nor have I ever been. Ive questioned my gender identity but have never questioned my sexuality. Ive always liked girls. And everyone saying I like men not only hurts me but makes me feel like I'm weird or something is wrong with me..