How tf do I make friends in this situation?!

This year is my last year in high school which is important to
me bc I have to pass the most difficult exams of my life to get
in the university I want. So I gave up my social life to study all day and night and you know it gets really lonely I even stopped talking to many of my friends bc I didn’t have the time to
hangout. So I’m trying to make online friends but idk how to… like I don’t even know if there is even a site for that I rly need help I’ve been so bored and lonely my other irl
friends can’t even hang out w me bc they’re studying too