The first time I actually found out about sexuality was in my freshman year of high school. I worked hard and attended a school in a different town to be a part of their Vocational Agriculture Program because at the time I wanted to be a vet. There I made a new and very dear friend who was openly bisexual. She was the first non-straight person I'd met that was out of the closet. The fact that she was confident and comfortable about it was an INCREDIBLE way to be introduced to the community.
She was also the first person to calmly ask me what my sexuality was instead of assuming what it was if I didn't say anything. At the time I shrugged and I believe I said straight or that I wasn't certain. I was shy and nervous so I didn't really want to stand out if I said that I honestly wasn't certain.
I wish I could say that freshman year ended well but I'm afraid it didn't. Barely three months in I suffered an emotional / mental breakdown and by the end of the year I had been diagnosed with a Severe Anxiety Disorder and decided it was best if I returned to my local school system.
The next three years of high school would sadly not be much better.