Let him figure out his own stuff, while you learn and show a bit more faith. Trying to remind of yourself shows lack of trust in his feelings for you and the Universe's ability to deliver.
Let's not forget we r all humans and we are imperfect, therefore you will make mistakes he will make mistakes but so what life goes on. Next time he contacts you, and he will, maybe you don't reply and show him that this is a two way street. However don't do it for revenge, but to teach a lesson. Your messages hold value, and how dare someone not honor them.