How do I move on from my first love?

So, basically, I was with this guy for a year and a couple of months. Three days ago, he decided to break up with me because I told him that I wasn't sure if I was going to be moving to where he lives for college. It's a long distanced relationship. I told him that because I was scared that it wouldn't work out but I didn't tell him that until last night. The night that I told him I might not come, he just broke up with me. That night, I saw that he had commented this girl that is his "best friend" and he said that he missed her and loved her and they should hang out soon. I have always been jealous of their relationship and now I feel like he left me for her? It hurts so badly, I can't stop crying. I don't eat or sleep because of this for these past couple of days. He wants to be just friends and he acts like nothing has happened. But I can't get over it. He hears me crying and says he's sorry. When asked why he is, he says Because I can stop the pain. So, when I asked him why isn't he, he replies I can't, I'm sorry. Then, he calls me a liar because I did not tell him everything in the first place and it could have all been avoided and I need to grow a backbone. I don't know what to do anymore. I love him with all my heart... It just hurts so badly to hear him act like we've never told each other how much we mean to one another.