How about a girl one or two years older than yourself? That's the situation I wish I would have been more open to when I was in high school. Sure, as a person on the spectrum, I was more mature than many fellow students my own age, also more serious minded. Now, that closes some doors, but it opens others.
Paramedics class? (real thing offered by community college)
drama club, including community theater?
taking judo or other martial arts? tennis? jazz dancing?
That is, don't limit your world to just high school itself. Yes, sure, you want to get good grades because that is the coin of the realm for whatever you want to do in the future (and I recommend the pre-study method for both math and science). But also, as Mark Twain says, Don't let your 'schoolin' interfere with your education.
Good luck. And a really good relationship will drop into your lap, so to speak, at a time you don't really expect it.