Is t normal to be like this with your ex.

well i started going out with this amazing guy awhile ago. he use to text me in the morning and at night, he took me to do things i never did, i was like part of his family. everyone in his family loved me. well after awhile things began to get rocky so we broke up. we still hung out and spent valentines day together. we were like normal and i really though we would get back together, but along the road somewhere we got to the point that we arent even speaking to each other. he refuses to talk to me because when we were together he said i blmed him. i told him why i was like that and he didnt care. now we avoid each other no matter what. part of me wants to listen to his family and try and get him to talk to me and part of me just wants to forget him. i am so confused what should i do.