dealing with a break up😣😔

I've just recently broken up with someone who I cared about so much and it's killing me! It's only been 2 days, and I feel like this heartbroken pain will never end! All my friend and his friend have all said that he treated me like shit, like he would shout at me in the streets, tag me in post on Facebook that are all negative, call me name and slag me off, but regardless I still cared about him! I've never had these feeling for someone before and it killing me! He accused me of seeing his best friend behind his back which I wouldn't dream of doing, and everyone told him to stop being so paranoid, but he didn't believe anyone and left me! Throughout the past 5 months he been saying it's over and shit, but he always came back and I let him! But now, I think this truly is the end and I don't know how to deal with it all! I need help, real bad because I honestly don't think I can deal with this much longer! Also one of his 'mates' has asked me out, just too meet up and shit, but I don't know what too do?! Do I move on and try and forget about him, or do I wait too see what could happen?! I just know if I do take he back he will continue treating me like shit, shouting at me and calling me name but I can't help how I feel, I need advice and fast!😔