Wow some pretty harsh advice for a guy you said was a good man at heart. You said he was surprised by what you had to tell him. It's common for people to stew about their feelings and issues and believe that the other person in the relationship is on the same page and knows that things are awful, but they just aren't there and are thinking everything is going good. You need to keep talking to him, you need to give him the time to digest and reflect on what you've told him so that he can catch up to where you are. Maybe if you give him the opportunity, he can come around and the two of you can work on the relationship together. You picked a time to talk to him, maybe deciding together a time and place to talk might work better. In the end it may be that this relationship will not work out. But as you said, you want it to end civilly, so treat him as you would like to be treated and maintain your dignity and grace through-out the process of either renewal or dissolution of your relationship. Good luck with whatever path you choose.