you can just accept that he is not meant for you and you deserve better !
ik but i want to get rid of the jealousy
think that your self respect and your worth is much more than that guy who cheated on you and even your bestfriend cheated on you !
he was not good for you.. whatever is meant for you . you will get it but crying over the one guy who dump you will take you to the place where you will suffer stress so , who left you let them go , and welcome new people to you life.. it's not like they got into a relationship so you will never get anyone but be happy that he left you he was not good for you. remember all good things happened between you too and say to yourself that the time he was with me was good and now he is not with me but he is still happy ... let them enjoy their life and you enjoy yours !