How do I know?

How do I know if I'm Ace or just not attracted to my husband? As I have gotten older I have questioned my sexuality more. Right now I identify as bisexual however I find myself more attracred to women. In any fantasy or adult video it's 99% of the time involving women. I also prefer to take care of my own needs which I feel only once or twice a month. My husband is the only long term serious romantic relationship I've ever had. I love him. But I don't feel the love as deeply as I always thought I would. I feel like there could be more. Would I be more sexually active with someone else? If I was in a relationship with a women?

Looking for 100% honesty. tia Confused 😕