Had a bad break up. I have nt done!

I can't get over a person. I was in relationship with a boy I loved him so much. But he was in relationship with someone else for about 6 year. He was under anxiety due to that. When the things get normal . The girl came back to him not for relationship . But for frndship. Due to that my boyfriend was ignoring he didn't took me so I left him but after some time he came back and said that the girl is getting married. So I believe on him he start dating each other now I came to knw that they are still in contact. His frnd insulted me nad blamed me that I am torturing him I can't get able to get over from this . I want to get away from him but when I got calm down I start mmissing him. I am not to able get over that insult from my mind I was blamed for the thing I have nt done