Well if if helps, I never realized just how straight I was until I had sex with another man. I was around your age, exploring my self identity, and I guess I wanted to fit in with some peer groups as at least fashionably gay.
What struck me was the vast difference between making out and going further with a man instead of a woman. I found the experience to be deeply sensual, but not sexual. When we were together I kept losing my erection, because I simply was not sexually aroused.
What I realized from the experience was that while I'd spent a lot of angsty time musing about my own sexuality and imagining what such a future could hold in store, there were some basic things that simply were not happening, and hadn't before. I'd never fantasized about having sex with a man while masturbating. Seeing perfectly-conditioned male bodies did not arouse me in the slightest. I didn't have a primal longing for cock, but I did for pussy. I'd thought of gay sex of course, but more as a curious kind of thought experiment, like trying on a new suit or taking a class in a subject I was entirely unfamiliar with. With women I'd get anxious wondering about when the right time to move in for a first kiss could be, yet I'd had no such thoughts when I first started making out with a dude. I just made him dinner, we had some charming conversation, he moved in and next thing I knew I was making out with a guy. (I didn't even plan to try to seduce him that night or anything; I just enjoy cooking.)
So, if you can do so without hurting someone in the process, I suggest that you experiment. You've felt what sounds like longing and desire for a woman, if not physical desire. So why don't you take it further and see what it's like to be with a woman?
Since you're talking about your sexuality, your sexual identity, pay attention to how sexual it feels. Note your body's response and your arousal. Think about it afterwords. Emotional attraction, sensual attraction, and sexual attraction are distinct. Try to learn what those differences are, for you.
Good luck.