Why won't he answer me?????

Okay my friend is mad at me over a misunderstanding. He thinks I started a rumor about him and his ex girlfriend. All I did was tell my other friend what i heard about his break up and she went around and told everyone! Now he's mad because he thinks I'm the one thats been spreading the rumors. I've emailed him and asked him if he would let me explain that i was just venting and didnt think that my friend would tell everyone but he wont email me back. He's like one of my good friends and I don't wnat things to end between us. Plz help me!