First major breakup... what should I do?

Hi, I'm in 11th grade and my boyfriend of 10 months broke up with me a little over a month ago. we were very much in love... we talked about marriage and life plans... naive I know, but thats how we felt. He broke up with me because he didn't have feelings for me anymore and felt that we were just like "buddies." And we were very different people without a lot in common. This came as a shock to me, because I didn't lose any feelings for him at all. He was as nice as he could have possibly been, and he made it very clear that he wanted me in his life. He said very nice things about me and told me that he thought I was incredible and how horrible he felt for doing it and said he would be "absolutely heartbroken" if i wasnt in his life. I am obviously extremely hurt and I have cried myself to sleep every night since. I made the mistake of texting him about 2 weeks after and I asked him more questions about the break up. He talked about it with me for a bit but then didn't text me again. I realize that was a bad choice. I waited it out for a week and I started to text him like normal people talk... and we talked for a bit. He texted me the next day. And then I saw him at one of our dances and we pretty much ignored each other completely. I didnt talk to him for a few days. Then I texted him 3 days in a row and I heard later from a mutual friend that he said he was "open to being friends" with me but I "am really annoying him." Since then, I havent talked to him in almost 3 weeks. I later heard from the same person he told him "We will never be able to be friends, it just won't work. She needs to move on." I don't know what to do.... He promised me he would be my friend. And I know now that I really do need to take some time for myself to heal before I can be friends with him. I just don't want him to completely rid me out of his life. Because I know I can learn how to love him as a friend. I cannot learn how to be a stranger with him. What should I do?