My ex left me ended our engagement then kept visiting me then when i lashed out one night telling his controlling mother he was seeing me behind her back. he blocked me out of his life completely. it’s been 6 months and he still is bitterly mad and answers with “best regards” or sarcastically repeats what i say back. He’s 30. Why is he is bitter after he hurt me? Left me and saw me drag my life to shit?