You can forgive him. As a friend, he likes you, and you can't bear this feeling. So, you can forgive him, but you should meet less in the future and keep their distance. Or if you think it is necessary, don't meet again in the future, even if he asks you out, you will find an excuse to refuse.

I think as time goes on, he will understand. And try to make new friends. The outside world is wonderful. Don't get carried away by anger, you will get old quickly, hehe, just kidding. Good luck!