What should I do about my boyfriends issues?

Me and my current boyfriend have been dating each other a year now. But we’ve been off and on about 5 times. He saw 5 other girls in those 5 times. I, on the other hand, saw one guy. Well about a month ago in January, we just completely stopped talking to each other but we didn’t officially break up. And about 2 days before February 10th which is our anniversary, he texted me. At that time I was talking to somebody else and I was pretty sure he was still talking to the last girl I caught him cheating with but he wasn’t. And on the 10th, he had left me a voicemail talking about how hes so happy for a year. I didn’t believe any of it because I really didn’t want to put myself through what he put me through again. But then yesterday, he kept blowing up my phone with text messages and calls that were unbelieveable. And then the phone calls got out of hand so I answered to one of them and we ended up talking for 3-4 hours. and we webcamed each other for 2. He wanted me to come see him today but I said no. Then he just apologized to me for not talking to him and me being so sick of it, I finally said thats not all you did. I told him how I knew about every other girl he talked to and how much I was heartbroken by that. He said “im really sorry for doing that to you. I was being a dumb * and I fked up.” So tonight he wants to webcam with me again so we can both confess to each other what we did. Now he is a Leo and im a Scorpio for those of you who understand compaibility. And yes we are very sexually attracted to each other and emotionally attarcted to each other. And I know that I will be crying when he confesses to me what he has been doing with these girls, but I don’t know how to say “you hurt me very bad and im so upset at you for it” in a way he would understand without him getting mad about it. Please help me on what to say or suggestions you may have that will heal our relationship. Please Please Please dont go ghetto and try and judge me by saying ignorant s**t like, “Girl you stupid for blah blah blah”. I will message you back and make you not want to say anything ever again. I really need help though. I love him with all my heart.