Missing my ex after 7 months

I still think about my ex more then I should, I go to bed every night crying over him, I still love him and I would do anything to have him back but he’s seeing someone older he’s even moved in with her and it’s making me so jealous how can he be absolutely fine whilst I’m at home crying over him? When will I get over him and how? This is so hard, I’ve tried going on dates with other men but I hate it and I end up going home early, everybody said I can do better but I don’t want better. I want him