Since I started coming on here a few weeks ago I've been noticing this phenomenon of seemingly straight women obsessing over an irrational doubt about their sexual orientation. They have clear histories of expressing heterosexual preferences, however some seed of doubt compells them to ruminate on "what if I actually like women and don't like men." My theory is that, as female sexual attractions are less overtly physical than male sexual attractions, women might compare their attractions to the way men lust after women and think their feelings are inferior. For a young woman of sixteen its perfectly healthy to not be lusting after every man you see. Most young women are very cautious about their sexual attractions and would only consider a physical relationship after many emotional bridges had been built. My theory is as you develop a full relationship with a young man, you will experience more intense attractions manifesting themselves. You are still very young and don't have a lot of experience with relationships, its easy to see why you might be a little confused about your feelings. And don't be so worked up about it; sexuality is just one part of a person, and NOT the most important part by far, despite what society says. The only thing that matters is for you to do what feels right for you; every single person is unique, and everyone has their own individual experience. none of them are wrong.
I was feeling the same thing as a straight male. I didnt even knoe hocd existed untill this site. I did some research and found a pdf about hocd after searching for hocd symptoms. I am on my phone or i would provide the link. Understanding the ocd better helped me realize what was wrong with me. After reading it i felt relieved. Im in an early stage of the ocd so it.probably is easier for me to overcome. I suggest doing research on the ocd just to understand what your brain is.actually doing. Good luck! I will get you that link.