Break up

How to get over a break up? I’ve been with this boy for almost 2 years have been cheated on multiple times and have took him back , meanwhile I’ve never cheated on him , I’ve blocked him on everything and now I miss him i don’t know what to do , he made a promise he would stop cheating which he did but we got to arguing over something real stupid we never really be done but I think he’s done this time he took everything as a joke and social media and doesn’t care about nobody but himself he’s selfish , what should I do ?? HELP PLZ