; break up

I can not believe what just happened to me.  My boyfriend just broke up with me!  My hurt just sunk when he said , "I can't be with you no more."  I just can not believe those words came out his mouth.  It seem like he do not want to be with me because of what I did.  Okay, so one of my ex-boyfriends text me && the friendly person that I am I texted him back.  We have been texting for like a hour or something like that.  So my boyfriend asked me who I was texting and I told him.  I did not think it was gone be a big deal , but he was really upset with me.  He said, "I told you not to text him period because of him calling you baby." And he said I was smiling and laughing(which I was).  I thought it funny at the time, but it's not now since we are not together.  I hope we can talk this over because I do not want this relationship to be over.  He is the guy I been hoping for for a long time and now he is gone because of this. :(