Well... I don't know about this. But what I would say is... no... I don't think you have gender dysphoria. Gender dysphoria is when a person feels they were born the wrong gender. (How they perceive themselves in their minds doesn't match their biological gender.) Gender identity dysphoria is something I've struggled with my entire life.

Sexual orientation is something else again. It involves which gender you are attracted to sexually. And the current thinking is that these two aspects of a person's personality (gender identity & sexual orientation) develop separately in the womb. So a biological male, for example, could feel he was born in the wrong body (internally he feels female); but his sexual orientation could be either heterosexual (attracted to girls) or he could be gay (attracted to boys). In my case, while I have always struggled with my gender identity, I was always decidedly heterosexual (attracted to girls)... which just made the whole thing even more confusing for me. I was also emotionally if not physically abused by my father. And I was bullied both verbally & physically throughout high school by a gang of older boys. So I'm uncomfortable around men. (Actually I'm not all that comfortable around women either though. So I pretty-much just keep to myself.)

I think you're probably correct that, at your age, having some bisexual interests is probably normal. I never did myself. But it seems from what I read that it probably is. The one thing I feel confident in saying, based on my own experience, is that anything related to sexual orientation or gender identity can be extremely confusing. (At least it always has been for me.) One thing I have come to understand, in recent years though, is that there are many resting places along the sexual orientation (as well as the gender identity) continuum. One does not have to be all one way or all the other. Perhaps the fact that you find yourself thinking more about guys than girls suggests that you have some gay aspects to your sexual orientation. That doesn't necessarily mean you're gay. It may just be one aspect of your personality. It's also possible, I would guess, that this interest in guys is just a passing fancy. And that over time, as you hopefully get out in the world more, it may just disappear. Time will tell. But either way... however it works out in the end... it's all good. I wish you well...