Totally weird... 😐

Soooo this so awkward to say but so I'm Ina relationship with this guy I've dated for 6 months...  Which is great! And he's the 10th guy I've been with (I'm 22) well all my life I've always wanted to experience what it would be like to be with a girl.. I love lesbian porn and the idea of another women eating me out just gives me chills.. But I don't know how to go about tellin him.. Or asking him if I could just get it out my system.... Am I textually bi??? Or what?? How do I go about handling this?