I have been questioning a lot my sexuality in these years and I became comfortable calling myself bisexual for a while, but now I'm confused about one thing: Why I don't want to get sexually involved with any guy? I know that there is some possibility for me to be a "late bloomer" for the males, but even with this in mind, I don't understand why I feel repulsed to the idea of getting into a relationship with males. I am able to find men attractive, I am able to get sexual fantasies about them and yet, just imagining myself being romantic with men doesn't sound even close to appealing... Can I still call myself bisexual or am I a lesbian?
You can call yourself whatever you want. Labels are more for you if you choose to identify with them. People often refer to the Kinsey Scale with post like these. I know some lesbians have said that while they can find guys attractive and not be completely repulsed by them sexually they would never be in a relationship with a guy. So yes you could identify as lesbian if you feel like any sort of relationship is non functional with a man. You could also be bisexual with a strong preference for women, or if we're getting technical maybe biromantic /homosexual. Either way whatever you feel comfortable with is up to you, and remember there's no pressure to fit yourself in a box.