Ya know what, that was also probably part of it for me. My own family members would talk about my body in disgusting ways x_x It also probably didn't help that I watched transmed youtubers back then...
I went through some serious denial for the majority of my high school years. I felt extremely out of place from my hormonal classmates and I found the term Demisexual online, so I thought I was that for a while. While I know I'm on the asexual spectrum, I'm not sure about Demisexual anymore...