Argument with my best friend.

Yesterday, i had an argument with my best friend, who i consider my brother.
   It all started three months ago, when we made two promises that he broke last week, we met yesterday to talk about the issue, and i was so angry that i started the conversation with the idea to do not have news about him again but, suddenly, he burst into tears while he was telling me that he was very repentant about it and that he won't do that again. This situation shattered me and i couldn't avoid forgive him.... Now, we are "brothers" again, and i know i value our friendship so much.