Am I lesbian?

So I'll try to make this short. I've identified as panromantic/abrosexual and non-binary for a while now. I'm a teen. I feel like I only like women now, though. I have fantasies of men, still, but the fantasies of women are stronger, if it makes sense. I came out as lesbian MANY years ago to my bisexual sis (no one else) but she said that because I liked a boy before (a male actor that I had an obvious crush on) I wasn't lesbian. Again, I still have fantasies of boys (I hope that's not too explicit) but I don't feel like I'd want a relationship with men. Nor do I have attraction to boys. But women on the other hand, I feel attraction to, want a relationship with them, have fantasies about them. I've also been feeling more like a girl than non-binary, and if not exactly a girl, then like demigirl, but that doesn't feel right. But I'd also feel like a fraud if I was just suddenly lesbian after a few years of identifying as pan/abro/nb. Any help helps 💜