Hey man, I'm glad you appreciated the comments. Whenever I've seen a post to the effect of "run longer events" on a HS -oriented thread there had been uproar and fury. (There aren't many posters saying what I did but I have occasionally posted myself...)
So here's the deal: I was your age during the so-called 'running boom' of the '70s and '80s which probably could be called the 'road racing boom' or more accurately 'marathon boom'. Shorter, Rodgers, and Salazar made the event appealing to the masses. So when I met a few guys at school who ran, we trained together. We put together a team for a road relay (legs between 4 and 11 miles) one year and I remember a marathon that 3 others and I rode to with my dad driving. The school didn't endorse or even know about any of this. There wasn't a coach or official who would corral anyone seen running in the area. There were so many people out on the local trails in those days.....
None of this seemed strange at the time. Our parents weren't all bent out of shape if we ran but not for the school. They wanted to do marathons themselves! I was heckled very occasionally by 'the team' if I passed them on a trail but none of them could beat me at anything longer than 5 miles, so I really had the last laugh, and again, several of the best in the school frequently ran with me.
I think your times are great and encourage you to keep up the good work. You would have been competitive when I was running, but not an outlier (meaning also not an outcast). These days, of course, a 2 hour half often wins 17-and-under since there's only 1 finisher. I completely agree with you that the teenage road scene would be more like it was years ago if some of these decent HS runners were doing longer events as some of them are naturally slow-twitch and suited to halfs and fulls. They will discover this at 24yo but you'll have a decade head start. So do what you're doing!
The main challenge will be lack of peer approval. Alana Hadley's blog goes into this. Hopefully the mention of her name doesn't derail this thread or get it deleted, as her experiences are a perfect example of the consequences of pursuing distance running as an American teen. She let the disapproval and ridicule get to her but if you don't - and your parents allow training without coaches or chaperones (ours did), then the sky's the limit. Remember, the great Sammy Wanjiru started out with 10km and up from your age. Put in your miles!