Is it normal im curious

I stopped talking to the friend last year due to his fall with weirdos. Hes attention seeking so we had little in common but it worked because we respected each other. He got pulled into a group of weirdos. One an addict and the other a woman who is a man and is dating a much younger woman euw. My friend got weird from them. He told me they party hard but he likes it. I think they worsen him.
He got distant started acting careless. He got mental and was granted therapy and antidepressant. He would distance because I know him and I can tell the difference. Long time passed then he admited to me hes different and we are not good friends. Then he said next text message that we are good friends. Back and forth many times. I got annoyed said I dont want his fakeness so goodbye forever.
I found out recently hes no longer friends with the weirdos after we end. I dont know why but maybe its good karma for me. I doubt he would end all friendships.
I think I saw him today while I was sat on the bus. I saw short round man with the stringy long hair outside. I thought to myself if I run into him in the pavement I will say hi for good manner. Maybe if hes had character development I will accept him. He wanted my friendship but was not honest about things. Maybe about the weirdos. I dont care. I am curious why he no longer like any of them anywho. It sounds juicy?