My sex drive fluctuates a lot. Most of the time, I have no sex drive, much to the dismay of my boyfriend. And other times, I have a huge sex drive, and I can't really explain or figure out why. The reason why I think I may personally have a low sex drive is because I am not comfortable with my female body. I think if I had the body I want, my sex drive would spike and be consistent.
Could just be me, because you may be cool with your body, in which case, yes, it may just be a hormonal thing. Not all people have significant sex drives, and that's okay. It may change over time, or with different partners. You never know.