Time is your best friend. It is okay to miss him. Allow yourself to do that. May I suggest tweaking how just a little bit? Schedule your missing him. Do it at the same time every day. Write, reminisce in your mind, feel sorry for your self and even cry if you need to. The key is making yourself only allow thoughts of him during that special time. The rest of the day thoughts of him are off limits you have life to live. In time you will begin to forget having that time for remembering him or something great will come along and you will find yourself with better things to do.