There’s nothing wrong with choosing to be gay or liking the same gender. It’s your choice, you chose to be this thing and you should be proud. Yeah, some are born knowing they don’t feel a certain way, but changing is a normal part of human life. Everyone makes choices that can affect them, it’s part of human nature.
No I'm so happy you brought this up because this is genuinely so real. Like I personally was also exposed to sexually explicit media at a very young age, and then porn a little while after that (while still very young), and I think it had a very large impact on my sexual disposition and my understanding of "being gay", and even how I view romantic versus sexual attraction.
However, I would also like to tell you that sexuality is a spectrum for a reason, and being exposed to something like porn when young is not entirely a deciding factor on what people you will be attracted to as you develop--it might have an affect on how you view these feelings, but overall you being gay is rooted in the things that you feel regardless of choice, so if its possible that someone in your same situation might NOT turn out to be gay, then you know that you are gay because you felt the way you did and continue to feel the way you do. Still, if you are feeling conflicted with your sexuality and identity regarding it, there's no need to feel pressured into defining yourself with a label. You like who you like because that's who you like, there's no rush in finding yourself, and you don't have to be "born gay" to be gay.
i feel like being exposed to porn at a young age made me gay and now im scared bcus it feels like a choice i made instead of just being born gay.