Lesbian fantasies

Hi I would say I’m heterosexual as I have only been in relationships with men and can only see my self in a relationship with a man, however for as long as I can remember I have always had fantasies of having sex with women and only watch lesbian porn... like I turns me on so much !

I have never had sex with a women, but on a drunken night out I have kissed one but that’s as far as it went. Before any one ask, NO I am not open to threesomes etc ! But I do want to discreetly explore my sexuality maybe ?

I’m just confused, am I bisexual ? Or is this just a fantasy ? I never check women out or think wow she’s fine but when I’m horny it’s always lesbian porn I turn to !