Lack of communication about cyber

I have been talking with my online friend for a while now. I have posted about how I messed up in a previous thread. I messed up really bad. He is now only communicating through email where as previously we spoke on Skype, on the phone and facebook. But since I messed up, he only chooses to correspond through email now. I really miss him and I want his friendship back. We spoke about everything from religion to marriage and children to what we were going to do when we finally did meet. He enjoyed our conversations as much as I did until I messed up. 
Now I am regretting everything. I really miss him. I have sent him a few emails telling him that I miss his friendship but he still instists only communicating through email. Not all the time he responds to my mail. I understand life can get busy. I just want his friendship back, even if it mean's we only speak on Skype once a week. In the beginning we did speak every day, but I am happy to minimise contact.

Having a friendship online is hard because you can not see the person and it makes apologies and communication very hard. I do not know how to express myself to him. What can I do? If it was a "real life" relationship we could sit down and talk about it. I have sent him a clip to apologise and I am not sure if he recieved it. How do I get his friendship back over the internet!? I miss him so much that it hurts.