Confusion - ace?

Hello. I need some help figuring out my sexuality.

At the moment I think I'm asexual but I'm not too sure. I have occasional celebrity "crushes" but even if I knew them personally, I wouldn't want romance or sex or whatever. I haven't yet been attracted to a person in my life.

Celebrity thing is more of a "wow he's so coool and nice" than HOLY MOLY I WANT TO DATE AND FUCK YOU thing. I recognise when people are attractive but I have no desire for anything real. I've occasionally tried to convince myself I wanted something real (with my best friend, I wanted so desperately to feel attraction to somebody, anybody, that I tried convincing myself I loved her and let's just say, it wasn't a good idea).

I fangirl a lot? In the way like HE'S HOT but if I had a chance I wouldn't want to take it. And I've only had celeb crushes on males (I'm F so straight perhaps?)

I've tried masturbating and it feels good but I don't have any sex drive or romance drive.

Sorry for this confusing and long post. I just need some help here.