Hey 16 y/o, R this side. I know what it feels like because I have been in the exact same position. Get out of your house more, get some air, play some outdoor games to relax your mind. You study so much, it isn’t good as well. Stay in touch with your best friend and your favorite people. Just hang in there, it’s just your age. I was there just a year ago and I can tell you by my experience. Don’t overstress and overburden yourself over things you can’t control. All the best! Peace out✌️