You can't go into NC if you hope to repair your relationship.
First of all, you already told him how you feel, so he's well aware of your feelings.
Secondly, the ball is on his court. He has to decide what he wants to do, knowing your feelings.
Thirdly, now that you are going into NC, you have to realize that you're going in NC to recover from the breakup and not to win him back.
Feelings can't be forced. If he wants to be with you, will find you. But you have to be prepared that he won't come back, which appears to be the case at this point. So while you're in NC, spend this time to recover and move on with your life. If he comes back, then great! But if he doesn't, then at least you'll be in a better position to move on with your life.
Like the others have suggested, try reading the stickies to help you cope with the pains of the recovery process.