The no contact will not produce the desired fruits. This is attested by him not responding to your silence.
However, you should carry on with the rule for a month. He might respond during the no contact period (the thought of losing you after chasing you for more than a year will be too much for him to bear), it provides you with ample time to reflect on the commitment issue.
Even so, the no contact doesn't go well with the recipient of the exercise as it creates a different picture to the person. He might think you no longer want to be in a relationship with him - you no longer want to commit yourself to the relationship.
You might want to employ the rule for two weeks to be sure where the tide is turning to.
In order to not cause confusion or spread a different message to him, it is a safe thing to inform him to give you time to reflect on the issue for a certain period of time. After contemplating it during that period, you will give your answer.