how the fuck do I cope with school life fomo?

I'm a 17 year old halfway through 12th grade and I feel like I'm missing out on a normal school life. In my country, college entrance exams are intense and I'm preparing for med school rn so I don't go to a normal school. Instead I only go to a prep school of sorts (we call them coaching classes here) and it sucks. I have no life. I'm not spending all my time studying either, so I'm failing and am in contact with only 2-3 people on a day to day basis. It sucks when I watch other people have fun with their friends and post all about it on their instagrams or whatever. I can barely get out of bed on most days and I can't help but think that I'm wasting my time doing fuck all.