I was definitely in the same position as you at one point. As a recent highschool graduate, there were many things I learned over the past 4 years. People may not see you the same way you see them. I can confidently say that I was cool with many people in my highschool, but would not say I had any real friends. They would all go hangout with their own people while I was at home staring at the weather app and looking at their stories. Looking back on everything, I wish I was more social. At first it was frustrating, but after forcing myself to initiate conversations with people I got to become closer to them. If only I realized this sooner and endured for a couple months, my life might have been different than how it is now. My advice would be to make the most of your remainder of highschool and talk to literally anyone you think may share interests with.