Does he know I'm ignoring him?

Me and my ex broke up quite amicably only a week and a half ago. We last saw each other in person on the day we broke up, as he wanted to tell me why (he no longer had romantic feelings for me and wanted to return to friendship). When we talked about it I told him that if we were to be friends after this I was going to need time to move on and not speak to him, which he agreed with.

Basically, my issue is that will he think that I have been hung up on him for 30 days or do you think the NC rule will make a difference and that he will miss me?

He will miss you. Being in a relationship is like a drug and he is in a withdrawal right now. He was addicted to it but now is gone. He will look for it dont worry. Btw. Dont agree being friends. Tell me more about this person and the circumstances