Don't wanna be sad anymore :(

So my ex and I broke up about a year ago. We were long distance. And it was the hardest thing in the world. But we've never stopped speaking. We've been on very good terms. I've seen him a couple times since. And we've been on the verge of getting back together sososo many times. And I will admit, he cheated on me when we were together, with 4 girls THAT I KNOW OF, and I'm sure there's so many more. He is very emotionally abusive. And I never could let go and just stop. He was supposed to make the 6 hour drive to come see me last week, and cancelled last minute because "his truck broke down". Come to find out he went and visited another girl, and is now dating her. I have finally said enough. And I deleted him off everything. Even changed my phone number. He begged and begged me to stay, which was the hardest thing in the world because he was saying everything I've wanted to hear, and I still left. I still said no. Now my question is. It's only been a couple days and I've taken refuge to my bed and can't stop crying. How do I stop looking at his social media and stop wanting to talk to him? I want him to come back and it's taking everything in me not to call him. Please help. I don't wanna be sad anymore.