I’m 16 and I don’t have any friends.

I’m 16 and I don’t have any friends.
I used to have two close friends that I would hang out with, but that ended and now I literally have nobody. Meanwhile, it feels like everyone my age has friend groups and hangs out every day.
I’ve basically spent my entire summer break sitting alone in my room. I don’t really go anywhere because I have nobody to go with, and it’s honestly making me feel pretty lonely.
Has anyone else been in this situation at my age? Did things ever get better? I’d really like to hear from people who have gone through something similar.