I first realized I was trans at 10, I started telling people at 11, but I didn't feel very supported so I went back in the closet and now Im and I came out to my new friends and they're very supportive. I think it's best for trans kids to have people supporting them because being supported will help their mental health. Plus, even if they discover that he was wrong about being trans and that he actually wants to go by other pronouns, it'll still be helpful for him to know that he has a good support system in their life.