1600 SAT but no motivation left for anything

I’m a current junior and I have no motivation left for anything. On paper I’m doing well-I got a 1600 SAT in September and my GPA is a 4.08/4.3 UW. But recently I’ve had no motivation to do my homework, study for tests, practice for my EC, study for extra comps, etc. I’ve just been doomscrolling on Instagram or binging Netflix. My grades aren’t doing so well in two important classes and I just have this sense of doom because if I start to fail things then I don’t know what I’ll do-I feel like my entire identity is built around my achievements. I don’t really have friends at school (it’s a small, elitist sort of private school and I don’t get along with anyone, and most are snakey AF) or any siblings. I feel like shit everyday. I thought it was just a “rut” and I would wait it out but it’s been several weeks. I have Asian parents that would never listen to how I’m feeling (usually if I say I’m feeling poorly and don’t have motivation, they’ll say something like “maybe you wouldn’t feel so busy and overwhelmed if you just did your studying earlier” or whatever). Every day is hell. I’ve wanted to get into Harvard or Princeton so badly but I am not on the right track right now. Any advice please? Idk if asking Reddit is the smartest thing but I have literally no idea what else to do