man, you're all good! in the direct light pic you have a great looking head.
Hair loss or not, you have a solid dome. You've got the perfect cut for it, you're not thinning in any one place or in a well-defined pattern, you look totally fine and you should enjoy the hell out of that last year of high school. Don't even think about it one bit. I'm sure I overlook guys hair loss like yours all the time...kept buzzed like that you really can't tell unless you have fuzz only in the horseshoe pattern which you don't, and other people really aren't as alert to male pattern baldness in high school as they are in their late 20's and on. To me, you would pass under the radar 100% unless I was really examining your head. (Not saying it's not male pattern baldness, you should definitely stick with a treatment plan and talk to your Doctor about finasteride and/or topical spironolactone use, but definitely don't let it affect how much fun you're having this year - you only live once, male pattern baldness or not!)