Well I started to get "sexual" when I was 15 and I think I fully accepted it at 16. It was easy for me because I knew my parents and friends would support me.
I feel like my parents found out about my sexuality years before I accepted the fact that I'm gay... like, they popped the question SO many times and I didn't know what being gay was
When I about 15. Around then, I found a lot of guys attractive but I also had the biggest crush on this girl. I was really confused and googled some stuff. I ended up finding a post that said "if you like someone, you like someone. it's not worth stressing over labels.". That made sense to me so since then, I've been pretty comfortable with my sexuality. It's not something I really worry about anymore. I've learned to just go with the flow.