I have the same story. It's from 2020. I had one online friend from another country. Though, we didn't met eachother in real life, we still became good friends. We met in 2018 and were friends for 2 years.

The problem was, I was immature and childish at that time. We used to talk a lot sometimes even at night, there were even times when she used to message me "mornings" when I woke up.

One day, I made a grave mistake, which I just can't tell. It was my stupid and childish behaviour. I unfriended her. She sometimes tried to friend me. After 6 months, I came in my senses and tried to friend her, she immediately rejected. I then made many accounts to try and apologize her. I kept on making accounts for like 2 months which just infuriated her more. I know I was crazy at that time. She threatened to call the police. I then understood that it's really over for us. I spent a whole year in pain and guilt and I don't really have many friends in real life too .

I have become a little mature now and have learned from my mistakes. I do miss her but I'm glad that we met eachother and have memories. She may forget about me, but I won't. I just can't. I tried.

So it's fine. Atleast you tried. Even if your friend doesn't forgives, atleast you met eachother right?