What should I do when a guy doesn't keep his promises most of the time?

My boyfriend and I just got a fight and it's always for the same reason. He doesn't keep his promises most of the time. He would always let me expect that he would do it, but then, he won't. The last time we had a really crazy fight was,he told me that he would see me. I expected so much. I was so excited to see him, even though, I wasn't replying to his messages because we just had a previous fight. He did not tell me that he couldn't make it. I was so hurt that I blew off everything. I have said so many hurtful words, words that I can't take back. He said, we would talk about it, but I just don't know how we can fix this anymore.