Awaiting confirmation indicates that the contact hasn't confirmed their interest in getting your emails. To get him back as an active contact you would need to ask him to resubscribe to your mailing list. A simple way to do this is to direct him to your website or Facebook page signup boxes. If you don't have these set up there are other ways, check out this FAQ!
I apologize for any confusion of these contacts that are in awaiting confirmation! I took a peek at your account and can see you have spoken to our Account Review support about your contacts in the past. It looks as if you may have had to send a Confirmed Opt-In email to your contacts, but were not required to turn it on for the future. Sending out a Confirmed Opt-In to your contacts will cause all contacts who have not yet responded to remain in awaiting confirmation. This is done to help make sure you are working with the most updated version of your contact list to help avoid and bounces or possible spam reports. If you have any further questions, please reach out to our Account Review team directly.